The Code S01E01: "Numbers"
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0:01 - 0:04Subtitles downloaded from www.OpenSubtitles.org
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0:07 - 0:09BOY: 'One for sorrow
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0:09 - 0:11'Two for mirth
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0:13 - 0:15GIRL: 'Three for a wedding
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0:15 - 0:17'And four for death
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0:17 - 0:19BOY: 'Nine for hell.'
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0:22 - 0:24GIRL: '666.'
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0:27 - 0:32Hidden within this cathedral
are clues to a mystery, -
0:32 - 0:34something that could help answer
-
0:34 - 0:37one of humanity's most
enduring questions... -
0:38 - 0:42..why is the world the way it is?
-
0:44 - 0:47The 13th-century masons
who constructed this place -
0:47 - 0:49had glimpsed a deep truth
-
0:49 - 0:53and they built a message
into its very walls -
0:53 - 0:56in the precise proportions
of this magnificent cathedral. -
1:01 - 1:03To the medieval clergy,
-
1:03 - 1:07these divine numbers
were created by God. -
1:09 - 1:13But to me, they're evidence
of something else, -
1:13 - 1:16a hidden code that underpins
the world around us, -
1:16 - 1:21a code that has the power to unlock
the laws that govern the universe. -
1:49 - 1:52As a mathematician,
I'm fascinated by the numbers -
1:52 - 1:55and patterns we see all around us...
-
2:04 - 2:08..numbers and patterns
that connect everything -
2:08 - 2:11from fish to circles
-
2:11 - 2:13and from our ancient past
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2:13 - 2:16to the far future.
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2:20 - 2:22INDISTINCT COMMENT
-
2:28 - 2:31Together they make up the Code...
-
2:33 - 2:36..an abstract world of numbers...
-
2:38 - 2:44..that has given us
the most detailed description
of our world we've ever had. -
2:56 - 3:01For centuries, people have seen
significant numbers everywhere... -
3:03 - 3:08..an obsession that's left
its mark in the stones
of this medieval cathedral. -
3:19 - 3:23In the 12th century,
religious scholars here in Chartres -
3:23 - 3:28became convinced these numbers
were intrinsically linked
to the divine... -
3:32 - 3:36..an idea that dates back
to the dawn of Christianity. -
3:38 - 3:42The fourth-century Algerian cleric
St Augustine believed -
3:42 - 3:46that seven was so special that it
represented the entire universe. -
3:46 - 3:50He described how seven
embraced all created things -
3:50 - 3:52and ten was beyond even the universe
-
3:52 - 3:56because it was seven plus the three
aspects of the Holy Trinity - -
3:56 - 3:59Father, Son and Holy Ghost.
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4:04 - 4:1212 was also hugely important, not
simply because there are 12 tribes
of Israel or 12 disciples of Jesus, -
4:12 - 4:19but because 12 is divisible by one,
two, three, four, six and 12 itself, -
4:19 - 4:21more than any other number
around it. -
4:21 - 4:25For St Augustine,
numbers had to come from God -
4:25 - 4:28because they obey laws
that no man can change. -
4:32 - 4:36Around 800 years after St Augustine,
-
4:36 - 4:41the 12th-century Chartres School
also recognised their significance. -
4:44 - 4:48It's thought that, under
their influence, sacred numbers -
4:48 - 4:52were built into the structure
of this majestic building. -
4:55 - 5:00Numbers, they believed, held
the key to the mystery of creation. -
5:07 - 5:11I've spent my entire working life
studying numbers, -
5:11 - 5:15and for me they're more
than just abstract entities. -
5:15 - 5:17They describe the world around us.
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5:17 - 5:20Although I don't share their
religious beliefs, I can't help -
5:20 - 5:23feeling something in common with
the people who built this place. -
5:23 - 5:27I share their awe and wonder
at the beauty of numbers. -
5:27 - 5:32For them, those numbers brought them
closer to God, but I think they're
important for another reason, -
5:32 - 5:37because I believe they're the key
to making sense of our world. -
5:42 - 5:48Numbers have given us
an unparalleled ability
to understand our universe. -
5:50 - 5:55And in places, this code
literally emerges from the ground. -
6:02 - 6:04Rural Alabama,
-
6:04 - 6:07spring 2011.
-
6:09 - 6:12Warm, lush and peaceful.
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6:19 - 6:22But this year,
there's a plague coming. -
6:30 - 6:32While some locals are moving out,
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6:32 - 6:37Dr John Cooley has driven
thousands of miles to be here. -
6:40 - 6:44He's on the trail of one
of the area's strangest residents. -
6:51 - 6:56We have been driving around
looking for the emergences for
about three and a half weeks. -
6:56 - 7:01I've driven 7,200 miles
since Good Friday trying to figure
out where these things are. -
7:07 - 7:11What makes these insects
so remarkable is their
bizarre lifecycle. -
7:14 - 7:19For 12 whole years, they live hidden
underground, in vast numbers. -
7:23 - 7:26Then, in their 13th year...
-
7:26 - 7:29at precisely the same time...
-
7:31 - 7:35..they all burrow out
from the earth to breed. -
7:41 - 7:47At the full part of the emergence,
there will be millions of insects
out per acre. They'll be everywhere. -
7:47 - 7:49It really is insect mayhem.
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7:55 - 7:59This is the periodical cicada.
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8:01 - 8:04This one is a male...
-
8:05 - 8:08..and you know that
because on the abdomen, -
8:08 - 8:10there's a pair
of organs called timbles, -
8:10 - 8:13and they're sound-producing organs.
-
8:13 - 8:16It's a little membrane that's
vibrated, it makes a sound. -
8:16 - 8:19Oh, yeah. I don't have to be
frightened of these, do I? -
8:19 - 8:22No, no, they're absolutely harmless.
They make wonderful pets. Really? -
8:22 - 8:25Mm-hm. They're quite ticklish.
It's a harmless insect. -
8:25 - 8:29It doesn't bite, it doesn't sting,
nothing of that sort. -
8:29 - 8:32Its only defence
is safety in numbers. -
8:34 - 8:38By emerging in such vast numbers,
each individual cicada -
8:38 - 8:41minimises its risk of being eaten.
-
8:41 - 8:43Because there are so many of them,
-
8:43 - 8:47their predators simply
can't eat them fast enough. -
8:48 - 8:52Well, you can certainly hear
the cicadas. -
8:52 - 8:55Yes, you can. There are probably
millions of them up there. -
8:55 - 9:00Millions? Yeah, millions. What
you probably don't realise is you're
only hearing half the population. -
9:00 - 9:02Only the males make
these loud sounds. -
9:02 - 9:05There are just as many females
up there as well. -
9:05 - 9:08And it's extraordinary to think
that if we came here next year, -
9:08 - 9:12we wouldn't hear this sound at all?
You'll have to come back
in 13 years. -
9:12 - 9:16So 2024 is when you'll hear the
forest singing like this again? -
9:16 - 9:19That's right. That's amazing.
-
9:25 - 9:31Why have the cicadas evolved
with this 13-year lifecycle
as opposed to any other number? -
9:31 - 9:36Well, you have to remember
that these cicadas require
large numbers to survive predators, -
9:36 - 9:41and so we think that these
long lifecycles in some way help
them maintain large populations. -
9:47 - 9:51John believes that,
by appearing every 13 years, -
9:51 - 9:54the cicadas minimise their chances
of emerging at the same time -
9:54 - 9:57as other cicadas
with different lifecycles... -
10:00 - 10:05..because if they were
to interbreed, it could have
disastrous consequences. -
10:08 - 10:12The offspring would have
unusual lifecycles. -
10:12 - 10:17They're going to emerge a little
bit here, a little bit there, some
this year and some that year in small -
10:17 - 10:22numbers, and that's key because
if they emerge in small numbers,
the predators eat them. -
10:34 - 10:39The cicadas' survival
depends on avoiding other broods. -
10:54 - 10:58Imagine you've got
a brood of cicadas
that appears every six years. -
11:11 - 11:14Now, let's suppose
there's another brood -
11:14 - 11:17which wants to try and avoid
the red cicadas. -
11:17 - 11:22One way to do that would be
to appear less often in the
forest, and that actually works. -
11:22 - 11:25So let's suppose
this brood appears every nine years. -
11:33 - 11:37So if the green cicada appears
every nine years, -
11:37 - 11:41then it only coincides
with the red cicada every 18 years. -
11:42 - 11:46But, rather surprisingly, a smaller
number, seven, works even better. -
11:57 - 12:02Coming out every seven years
instead of every nine -
12:02 - 12:05means the cicadas appear together
much less often. -
12:07 - 12:11Now they only
coincide every 42 years. -
12:12 - 12:15That's just twice every century.
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12:19 - 12:21And for the real cicadas,
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12:21 - 12:27a 13-year lifecycle has exactly
the same effect as seven does here -
12:27 - 12:32because they both belong
to a special series of numbers. -
12:32 - 12:36Like 13, seven is a prime number.
-
12:36 - 12:41Unlike other numbers,
primes can only be divided
by themselves and one, -
12:41 - 12:45and it's this property
that means that numbers
that are separated by primes -
12:45 - 12:49are far less likely to coincide
with multiples of other numbers. -
12:51 - 12:55Because 13 is a prime number,
a 13-year lifecycle -
12:55 - 13:00makes the cicadas much less likely
to coincide with other groups. -
13:02 - 13:06Up in Georgia, there is another
brood of periodical cicada -
13:06 - 13:09and they, too,
have a prime number lifecycle. -
13:09 - 13:12They come out every 17 years.
-
13:12 - 13:16Because 13 and 17
are both prime numbers, -
13:16 - 13:22the two broods only emerge together
once every 221 years. -
13:30 - 13:35Prime numbers are intimately
linked to the cicadas' survival -
13:35 - 13:37and, intriguingly,
-
13:37 - 13:41they're one of the most
important elements of the Code, -
13:41 - 13:46because the Code
is a mathematical world, -
13:46 - 13:49built from numbers.
-
13:49 - 13:54Just as atoms
are the indivisible units
that make up every physical object, -
13:54 - 13:58so prime numbers are the indivisible
building blocks of the Code. -
14:03 - 14:07Prime numbers are indivisible,
which means they can't be made -
14:07 - 14:11by multiplying
any other numbers together. -
14:12 - 14:17But every non-prime number
can be created by multiplying
primes together. -
14:21 - 14:24It's impossible to make
any numbers without them. -
14:30 - 14:33And if any primes are missing,
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14:33 - 14:37there will always be
some numbers you can't create. -
14:44 - 14:49For me, the fact that the most
fundamental units of mathematics -
14:49 - 14:51can be found woven
into the natural world -
14:51 - 14:55is not only compelling evidence
that the Code exists, -
14:55 - 14:59but also that numbers
underpin everything... -
15:01 - 15:04..including our own biology.
-
15:34 - 15:37This is an innately human
characteristic. -
15:37 - 15:44Music is one of the things which
defines who we are, and each culture
has its own particular style. -
15:44 - 15:46These guys make it seem
so effortless, as if the notes -
15:46 - 15:51are just thrown together,
but that's simply an illusion. -
15:54 - 15:57MUSIC ENDS, APPLAUSE
-
15:58 - 16:02Because, just as numbers
govern the cicadas' lives, -
16:02 - 16:05so they determine how WE hear sound.
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16:27 - 16:28That's a C.
-
16:28 - 16:31And using this oscilloscope,
I can get a picture of that note. -
16:32 - 16:36So I can actually
SEE the sound wave. -
16:36 - 16:40Now, the height of the wave
corresponds to how loudly
I'm playing the note, -
16:40 - 16:43so if I play the note
very quietly... -
16:43 - 16:48play it very loudly...I suddenly
get a huge wave on the screen. -
16:48 - 16:51The more important thing
is the distance between
the peaks of the wave, -
16:51 - 16:55because that's determined by
the pitch or frequency of the note. -
16:56 - 16:57'The higher the note...
-
16:59 - 17:03'the shorter the distance
between the peaks.' -
17:09 - 17:12Now, look what happens
when I play a C... -
17:14 - 17:18..and compare that with the same
note, a C, but an octave higher. -
17:21 - 17:24Something rather surprising emerges,
-
17:24 - 17:28because now you can see
that the higher note has twice -
17:28 - 17:30as many peaks as the lower note,
-
17:30 - 17:35which means the frequency of the
high C is twice that of the low C. -
17:35 - 17:38And this happens whatever
two notes you choose. -
17:38 - 17:44Provided they're an octave apart,
then their frequencies are going
to be in this one-to-two ratio. -
17:49 - 17:53Two notes which are an octave
apart just sound nice together,
and they're actually the most -
17:53 - 17:57harmonious combination of notes
that you can have. -
17:57 - 18:03And that's because one to two
is the simplest possible frequency
relationship, and that's what -
18:03 - 18:09music is all about, because it's
these simple whole-number ratios
that sound so good to the ear. -
18:09 - 18:12A perfect fifth...
-
18:12 - 18:14is a frequency ratio
of three to two. -
18:14 - 18:16A perfect fourth...
-
18:16 - 18:18is four to three.
-
18:18 - 18:22And a slightly more complex sound,
a minor sixth... -
18:23 - 18:27..that's a frequency ratio
of five to eight. -
18:29 - 18:34Every combination of notes used in
music is defined by simple ratios. -
18:36 - 18:41Although we might not be aware of
it, these numerical rules underpin -
18:41 - 18:46everything from the simplest song
to the most elaborate symphony. -
18:46 - 18:50They're so deeply ingrained
that when they're broken, -
18:50 - 18:53we intuitively know
something is wrong. -
19:06 - 19:10Professor Judy Edworthy
understands this more than most. -
19:14 - 19:20She spends her time subjecting
people to some of most unpleasant
noises imaginable. -
19:21 - 19:23Hi, Judy.
-
19:23 - 19:25Ah, hello. Marcus.
-
19:25 - 19:29'Her research investigates
the psychological effects of sound. -
19:33 - 19:42'And by using complex ratios
instead of simple ones, the noises
she creates are nothing like music.' -
19:42 - 19:46You can see just by looking at it
it's not going to sound nice. -
19:46 - 19:47The wave looks a mess.
-
19:47 - 19:50The wave is a mess.
It's very difficult to see a pattern. -
19:50 - 19:54CONSTANT DRONE
-
19:54 - 19:56OK. It sounds really quite odd now.
-
19:56 - 20:01It doesn't have any pitch. It sounds
harsh and I could make it louder
and that would make it harsher. -
20:01 - 20:05When the various frequencies aren't
simple multiples of one another, -
20:05 - 20:08there's no common pattern
for the ear to respond to, -
20:08 - 20:12and the more complex you make
the ratios, the more dissonant
and harsh the sound will get. -
20:16 - 20:20By monitoring her victims' reactions
to these appalling noises, -
20:20 - 20:24Professor Edworthy has found
they have a very different effect -
20:24 - 20:25on our minds than music.
-
20:25 - 20:27ALARM BEEPS
-
20:27 - 20:30HONKING
-
20:30 - 20:31WHIRRING
-
20:31 - 20:34They're so unpleasant...
HAMMERING -
20:34 - 20:37..they shock our brains into action.
-
20:37 - 20:39For example, a siren.
-
20:39 - 20:43HIGH-PITCHED SIREN BLARES
-
20:46 - 20:50That's quite a harsh sound,
but it's designed for a purpose -
to get you out of the way. -
20:50 - 20:54Sometimes you find these sounds
in the animal world as well. -
20:54 - 20:57So this, for example, this is
a chimpanzee and an orang-utan. -
20:57 - 21:00INTERMITTENT SCREECHING
-
21:03 - 21:08OK, these animals are obviously
quite bothered by something. -
21:08 - 21:12You don't need to know
what that sound means to know
that that animal's not happy -
21:12 - 21:18and also that the other animals in
that environment and us, for example,
should just get out of the way. -
21:18 - 21:20SHORT SCREECH
-
21:20 - 21:23So it's interesting
that we really hear pattern, -
21:23 - 21:28and when it isn't there,
it creates an effect in all of us. -
21:28 - 21:30LOW-PITCHED SCREECH
-
21:37 - 21:41Remarkably,
it's numerical patterns in the Code -
21:41 - 21:45that dictate the combinations
of sounds we hear as music... -
21:45 - 21:47RUSTLING
-
21:47 - 21:51..and those we hear simply as noise.
CHIRPING, SIREN -
21:51 - 21:54BELL TOLLS
-
21:54 - 21:59And perhaps stranger still,
it's these same numbers -
21:59 - 22:02that are built into the walls
of this medieval cathedral. -
22:08 - 22:13Two notes
which are an octave apart are
going be in this one-to-two ratio. -
22:20 - 22:24The width of the nave here is twice
the distance between -
22:24 - 22:30each of the columns that run up
its length - a ratio of two to one. -
22:30 - 22:35The most harmonious
combination of notes from a pair. -
22:35 - 22:39The altar divides the nave
into a ratio of eight to five. -
22:40 - 22:43A minor sixth...
-
22:43 - 22:44eight to five.
-
22:48 - 22:50A perfect fifth...
-
22:50 - 22:52three to two.
-
22:52 - 22:55A perfect fourth is four to three.
-
22:55 - 22:58Major third, five to four.
-
23:01 - 23:04And that's what music is all about.
-
23:04 - 23:09St Augustine believed
these ratios were used by God
to construct the universe -
23:09 - 23:13and that that was why
they produced harmony in music. -
23:18 - 23:22By constructing their cathedral
using the same ratios, -
23:22 - 23:26the clergy at Chartres
hoped to echo God's creation. -
23:26 - 23:30This entire place
is a symphony set in stone. -
23:33 - 23:38Using the Code's numbers has created
a building of awe-inspiring beauty. -
23:53 - 23:54The only truth there is...
-
23:54 - 23:57Seemingly significant numbers...
-
24:03 - 24:07By searching
for divine meaning in numbers, -
24:07 - 24:1212th-century scholars had stumbled
across elements of the Code. -
24:12 - 24:14It's very difficult to see a pattern.
-
24:17 - 24:22Mysterious numbers and patterns that
seem to be written into our biology. -
24:23 - 24:26Its only defence
is safety in numbers. -
24:28 - 24:34And as we've looked closer, we
haven't simply found more numbers - -
24:34 - 24:42we've begun to uncover their
strangest properties and started to
see deep connections between them. -
24:46 - 24:50Back in the distant past,
in Neolithic times, -
24:50 - 24:55around 4,000 years ago, an ancient
people brought these stones here -
24:55 - 24:58and arranged them like this.
-
24:58 - 25:02This is Sunkenkirk stone circle in
Cumbria and it's one of around 1,000 -
25:02 - 25:07such structures that our ancient
ancestors built across the UK. -
25:14 - 25:17Stretching back
into the mists of time, -
25:17 - 25:21the circle has been
steeped in mysticism. -
25:25 - 25:28But whether the people who built
this structure knew it or not, -
25:28 - 25:32there is deep significance
hidden inside this circle. -
25:32 - 25:36OK, so I need to start
by measuring the diameter -
25:36 - 25:41of my circle, so that's the
distance from one edge to the other. -
25:44 - 25:46I need to go roughly
through the centre. -
25:49 - 25:51So that's 27 and 90.
-
25:55 - 25:59Right, so now I'm going
to measure the circumference -
25:59 - 26:01of the circle. So off we go.
-
26:01 - 26:03So around the outside.
-
26:06 - 26:08Oh, I've never got so much exercise
doing maths before! -
26:11 - 26:13And that's the circumference.
-
26:13 - 26:18So I've got 91 metres
-
26:18 - 26:21and 70 centimetres.
-
26:23 - 26:28I'm going to do
a little calculation. I'm going
to divide the circumference -
26:28 - 26:32of the circle by the diameter.
-
26:32 - 26:36So 917 divided by 279.
-
26:36 - 26:38So that's roughly three...
-
26:38 - 26:42Bit of, er, mental arithmetic, not
a mathematician's strongest point. -
26:42 - 26:45OK, two lots of 279,
-
26:45 - 26:47so...
-
26:47 - 26:49not far out
from what I was hoping for. -
26:49 - 26:55So when I do that,
I get roughly 3.2 as the answer. -
27:00 - 27:03My measurements
weren't very precise... -
27:05 - 27:10..but my answer is close
to a mysterious number
hidden within every circle. -
27:15 - 27:20So, for example,
let's take this circular plate here. -
27:20 - 27:22I'm going to measure its diameter.
-
27:22 - 27:2526.4 centimetres.
Now its circumference. -
27:27 - 27:29That's a bit trickier.
-
27:29 - 27:3282.9 centimetres.
-
27:32 - 27:36Divide the circumference
by the diameter, I get 3.14. -
27:36 - 27:39Now let's take another circle.
Measure its diameter. -
27:39 - 27:4112.8 centimetres.
-
27:42 - 27:47So the circumference
is 40.2 centimetres. -
27:47 - 27:52Divide the circumference
by the diameter and I get 3.14. -
27:52 - 27:56In fact, whatever circle I take,
divide the circumference -
27:56 - 28:01by the diameter and you're going
to get a number which starts 3.14. -
28:01 - 28:04This is a number we call pi.
-
28:09 - 28:14No matter where the circles are,
no matter how big or small... -
28:15 - 28:18..they will always contain pi.
-
28:20 - 28:27It's this universality of the
number pi which tells you you've
identified a piece of true Code. -
28:27 - 28:29In fact, if you get another number,
-
28:29 - 28:31it means
that you haven't got a circle. -
28:31 - 28:34In some sense,
pi is the essence of circleness, -
28:34 - 28:37distilled into the language
of the Code. -
28:38 - 28:43And because circles and curves
crop up again and again in nature, -
28:43 - 28:48pi can be found all around us.
-
28:51 - 28:54It's in the gentle curve
of a river... -
28:56 - 28:58..the sweep of a coast line...
-
29:00 - 29:04..and the shifting patterns
of the desert sands. -
29:07 - 29:13Pi seems written into the structures
and processes of our planet. -
29:19 - 29:22But, strangely,
pi also appears in places -
29:22 - 29:26that seem to have nothing
to do with circles. -
29:31 - 29:36I started fishing Brighton in 1972.
-
29:36 - 29:39I've been a fisherman 40 years,
catching Dover sole. -
29:41 - 29:45That's the main target species
for the English Channel. -
29:47 - 29:49How many fish
do you think you get a day? -
29:49 - 29:51300 some days, 150 other days,
-
29:51 - 29:53so I'd say 200 would be average.
-
29:53 - 29:58And you've got me some
Dover sole today so I can have a
weigh of what you've caught today. -
29:58 - 30:00Yeah, you can play with them! OK!
-
30:02 - 30:07What's remarkable is that, with just
a small amount of information... -
30:07 - 30:09It's 180 grams.
-
30:10 - 30:12..and by weighing a few fish...
-
30:12 - 30:13That's a whopper.
-
30:13 - 30:15..I can use the Code
-
30:15 - 30:17to tell me things
about not just today's catch... -
30:17 - 30:21360 grams. 50 grams. 110 grams.
-
30:22 - 30:25..but about all the Dover sole
Sam's ever fished... -
30:25 - 30:28Whoa, jeez, come back!
-
30:28 - 30:31..I can even get an estimate
for the largest sole -
30:31 - 30:33that Sam is likely
to have caught during his career. -
30:33 - 30:35Right...
-
30:35 - 30:41First , I need to work out what
the average weight of a fish is, -
30:41 - 30:46so 140 plus 190
-
30:46 - 30:48plus 150...
-
30:48 - 30:53So now I need to work out
the standard deviation,
so that's 140 minus square that... -
30:53 - 30:56Bear with me, all right?
Almost there. -
30:56 - 31:01So he said he fished for 40 years,
-
31:01 - 31:06and eight weeks during the year,
six days out of the week -
31:06 - 31:10and 200 sole each day,
-
31:10 - 31:14so that gives you
a total of 384,000 fish. -
31:16 - 31:20Using these numbers,
I can calculate that the largest one -
31:20 - 31:23out of those 384,000 fish
-
31:23 - 31:28should be about 1.3 kilograms,
which is roughly three pounds. -
31:30 - 31:34So what's the largest Dover sole
that you've caught in your career? -
31:34 - 31:37We call them door mats,
the large ones, -
31:37 - 31:40and you maybe get
four or five a season. -
31:40 - 31:45The largest, I'd say, was three
to three and a half pounds. -
31:45 - 31:50An average Dover Sole
is that sort of size -
31:50 - 31:51and these...
-
31:51 - 31:55Wow, that's huge! Yeah!
-
31:55 - 31:58It's a whopper. It's always nice
to catch big stuff, you know. -
31:58 - 32:01Well, I think it is anyway.
HE CHUCKLES -
32:05 - 32:09Using the Code,
it's possible to estimate the size -
32:09 - 32:12of the biggest fish
Sam's ever caught, -
32:12 - 32:16despite not weighing a single fish
anywhere near that size. -
32:21 - 32:28Now, the reason this calculation is
possible is because the distribution
of the weights of fish, -
32:28 - 32:33in fact the distribution
of lots of things like the height
of people in the UK or IQ, -
32:33 - 32:36is given by this formula.
-
32:36 - 32:39'This is the normal
distribution equation, -
32:39 - 32:42'one of the most important bits
of mathematics -
32:42 - 32:46'for understanding variation
in the natural world.' -
32:46 - 32:51The most remarkable thing about this
formula isn't so much what it does -
32:51 - 32:54as this term here, pi.
-
32:54 - 32:56It seems totally bizarre
-
32:56 - 33:00that a bit of the Code
that has something to do
with the geometry of a circle -
33:00 - 33:02can help you to calculate
the weight of fish. -
33:02 - 33:07Pi shouldn't have anything
to do with fish, yet there it is. -
33:15 - 33:20Just as the circle
appears everywhere in nature, -
33:20 - 33:24so pi crops up again and again
in the mathematical world. -
33:26 - 33:32It's an astonishing example of
the interconnectedness of the Code. -
33:32 - 33:37A glimpse into a world where numbers
don't just have strange connections, -
33:37 - 33:41they have deeply puzzling
properties of their own. -
33:44 - 33:47Pi is what's known
as an irrational number. -
33:49 - 33:53Written as a decimal,
it has an infinite number of digits -
33:53 - 33:57arranged in a sequence
that never repeats. -
33:58 - 34:03And it's thought that any number
you can possibly imagine -
34:03 - 34:07will appear in pi somewhere,
from my birthday -
34:07 - 34:11to the answer to life,
the universe and everything. -
34:14 - 34:17Because they go on for ever,
we can never know all the digits -
34:17 - 34:19that make up pi.
-
34:19 - 34:23But, luckily,
we only need the first 39 -
34:23 - 34:28to calculate the circumference
of a circle the size
of the entire observable universe, -
34:28 - 34:31accurate to the radius
of a single hydrogen atom. -
34:38 - 34:43But as strange as Pi is, it does
at least describe a physical object. -
34:45 - 34:48Some numbers don't make
any sense in real world, -
34:48 - 34:51despite the fact we use them
all the time. -
34:51 - 34:54Numbers, like negative numbers.
-
34:57 - 35:01It's impossible to trade anything,
stocks, shares, currency, -
35:01 - 35:04even fish, without negative numbers.
-
35:04 - 35:06Most of us are comfortable them.
-
35:06 - 35:09Even though we may not like it,
we understand what it means -
35:09 - 35:12to have a negative bank balance.
-
35:12 - 35:14But when you start
to think about it, -
35:14 - 35:17there's something deeply strange
about negative numbers, -
35:17 - 35:21cos they don't seem to correspond
to anything real at all. -
35:24 - 35:29The deeper we look into the Code,
the more bizarre it becomes. -
35:34 - 35:40It's easy to imagine one fish
or two fish, or no fish at all. -
35:40 - 35:45It's much harder to imagine
what minus-one fish looks like. -
35:45 - 35:49Negative numbers are so odd
that if I have minus-one fish
and you give me a fish, -
35:49 - 35:53then all you can be certain of
is that I've got no fish at all. -
36:01 - 36:07Numbers, can exist regardless
of whether they make any sense
in the physical world. -
36:11 - 36:16And if you think that's odd,
some numbers are so strange -
36:16 - 36:19they don't even seem
to make sense as numbers. -
36:20 - 36:24Now, this is one of the most
basic facts of mathematics. -
36:24 - 36:29A positive number multiplied
by another positive number
is a positive number. -
36:29 - 36:35So for example,
one times one is one. -
36:35 - 36:38A negative number multiplied
by another negative number -
36:38 - 36:41also gives a positive number.
-
36:41 - 36:47So for example, minus-one
times minus-one is plus-one. -
36:47 - 36:53'It's not only a rule, it's a proven
truth of multiplication. -
36:53 - 36:57'Whenever the signs are the same,
the product is always positive.' -
36:57 - 36:59From this, it's obvious
-
36:59 - 37:02if I take any number
and multiply it by itself, -
37:02 - 37:04then the answer
is going to be positive. -
37:04 - 37:07However, in the Code,
-
37:07 - 37:09there's a special number
which breaks this rule. -
37:09 - 37:13When I multiply it by itself,
it gives the answer minus-one. -
37:13 - 37:17It's impossible to imagine what
this number could be, -
37:17 - 37:21because there simply is no number
-
37:21 - 37:25that when multiplied by itself,
gives minus-one. -
37:25 - 37:29This isn't a number I can calculate.
I can't show you this number. -
37:29 - 37:32Nevertheless, we've given
this number a name. -
37:32 - 37:35It's called "i", and it's part
of a whole class of new numbers -
37:35 - 37:37called imaginary numbers.
-
37:38 - 37:43Calculating with imaginary numbers
is the mathematical equivalent -
37:43 - 37:45of believing in fairies.
-
37:46 - 37:51But even these strangest elements
of the Code turn out to have -
37:51 - 37:53some very practical applications.
-
37:58 - 38:02The ground's close, will you call
me, please, 1-1-9 next... -
38:04 - 38:09Runway 25, clear to land. Surface
is 1-3-0, less than five minutes. -
38:09 - 38:12'Especially on a day like this.'
-
38:16 - 38:218-5 Foxtrot, thank you, vacate next
right and park yourself 1-3 short. -
38:21 - 38:25'8-5 Foxtrot, 8-2-0, both making
approach down direct and right, 2-5.' -
38:25 - 38:28So where's this one coming from?
-
38:28 - 38:32That is from Barcelona.
It's an Easyjet flight, EZZ6402. -
38:32 - 38:35Don't know how many people are
on board, but it seats about 190. -
38:35 - 38:38And here he is.
He's getting pretty close now. -
38:38 - 38:40Just less than two miles
till he lands. -
38:40 - 38:44What information is the radar
giving you about the aeroplanes? -
38:44 - 38:47The first and most important thing
is the position of the aircraft. -
38:47 - 38:51The yellow slash there
is where the aircraft is. -
38:51 - 38:55You've got the blue trail,
the history of where
the aircraft's been. -
38:55 - 38:59From that you get two things -
you get its rough heading,
where he's going, and its speed. -
38:59 - 39:02The longer the trail,
the faster the aircraft's going. -
39:08 - 39:11Radar works by sending out
a pulse of radio waves -
39:11 - 39:15and analysing the small fraction
of the signal that's reflected back. -
39:19 - 39:23Complex computation is then needed
to distinguish moving objects, -
39:23 - 39:27like planes,
from the stationary background. -
39:27 - 39:30RADIO COMMUNICATION
-
39:30 - 39:36At the heart of that analysis lies
"i", the number that cannot exist. -
39:38 - 39:43Imaginary numbers are useful
for working out the complex way -
39:43 - 39:45radio waves interact
with each other. -
39:45 - 39:49It seems to be the right language
to describe their behaviour. -
39:49 - 39:52Now, you could do these calculations
with ordinary numbers. -
39:52 - 39:54But they're so cumbersome,
-
39:54 - 39:57by the time you've done
the calculation the plane's
moved to somewhere else. -
39:57 - 40:02Attitude 6,000
on a squawk of 7-7-1-5. -
40:02 - 40:05Using imaginary numbers
makes the calculation simpler -
40:05 - 40:08that you can track the planes
in real time. -
40:08 - 40:13In fact without them,
radar would be next to useless
for Air Traffic Control. -
40:17 - 40:21It's kind of amazing that this
abstract idea lands planes. -
40:21 - 40:24It's a bit surprising, you're talking
about imaginary numbers -
40:24 - 40:26and this isn't imaginary,
this is real. This is very real. -
40:26 - 40:30I'm surprised at the fact
that something so abstract -
40:30 - 40:32is being used
in such a concrete way. -
40:47 - 40:50As strange as it may seem,
the code provides us -
40:50 - 40:54with an astonishingly successful
description of our world. -
41:00 - 41:04Its most ethereal numbers
have starkly real applications. -
41:04 - 41:10Its patterns
can explain one of the most
profound processes in nature - -
41:10 - 41:14how living things grow.
-
41:17 - 41:20This is a picture of something
I've been fascinated by -
41:20 - 41:22ever since I became a mathematician.
-
41:22 - 41:26It's an X-ray of a marine animal
called a nautilus. -
41:26 - 41:31And this spiral here is one
of the iconic images of mathematics. -
41:31 - 41:34Now, while I've seen pictures
like this hundreds of times, -
41:34 - 41:37I've never actually seen
the animal for real. -
41:41 - 41:45'At Brooklyn College,
biologist Jennifer Basil keeps
five of these aquatic denizens, -
41:45 - 41:49'for her research
into the evolution of intelligence.' -
41:51 - 41:56We keep the animals
in these tall tanks because
they're naturally active at night -
41:56 - 41:59and they like darkness,
they live in deep water. -
41:59 - 42:02They also like to go up
and down in the water column, -
42:02 - 42:04that kind of makes them happy. OK!
-
42:04 - 42:07We give them the five-star
treatment here. Right... -
42:08 - 42:11This is Number Five. Ah, wow. Yeah.
-
42:11 - 42:13Gosh, big eyes.
-
42:13 - 42:17They have huge eyes, great for seeing
in low light conditions. Right. -
42:18 - 42:20So, here's that beautiful shell.
Yeah. -
42:20 - 42:23And the striping pattern helps them
hide where they live. -
42:40 - 42:45I've never seen the animal before
inside the shell, what is it? -
42:45 - 42:48They're related to octopuses,
squids and cuttlefish. -
42:48 - 42:50It's a little bit like
an octopus with a shell -
42:50 - 42:54and what's amazing about them
is that their lineage -
42:54 - 42:58is hundreds of millions of years old
and they haven't changed very much -
42:58 - 43:01in all that time.
We call them a living fossil. -
43:01 - 43:05It's a great opportunity to look
at an ancient brain and behaviour -
43:05 - 43:09and they're a wonderful way to study
the evolution of intelligence. -
43:09 - 43:11So are these guys intelligent, then?
-
43:11 - 43:16Some are smarter than others,
like that's Number Four, -
43:16 - 43:18he outperforms everybody
in all the memory tests. -
43:18 - 43:22He's quite active all the time,
he's quite engaging. -
43:22 - 43:24If you put your in the water
he comes up to you, -
43:24 - 43:27whereas Number Three,
who happens to be a teenager, -
43:27 - 43:30is I'd guess you'd say more shy
and you put him in a new place -
43:30 - 43:34and he sort of just attaches
to the wall and sits there. -
43:34 - 43:37I'm interested in the shell
as a mathematician, -
43:37 - 43:40but what does the nautilus
use the shell for? -
43:40 - 43:42I think the most obvious use
is protection. -
43:44 - 43:46They also use it for buoyancy.
-
43:46 - 43:48They only live in the front chamber
-
43:48 - 43:50and all the other chambers
are filled with gas -
43:50 - 43:52and with some fluid.
-
43:52 - 43:57By regulating that, they can
gently and passively move up and down -
43:57 - 43:59in the water like a submarine.
-
43:59 - 44:01The really cool thing they can do
-
44:01 - 44:04is they can actually survive
on the oxygen in the chambers, -
44:04 - 44:09if there's a period where
the oxygen goes down in the oceans. -
44:09 - 44:13It's one of the reasons why
they've lived for millions of years. -
44:13 - 44:16It's a really great adaptation.
The shell is really amazing. -
44:18 - 44:23But perhaps even more remarkably,
the rules this ancient creature -
44:23 - 44:24uses to construct its home
-
44:24 - 44:28are written in the language
of the Code. -
44:28 - 44:31HORNS BLARE
-
44:38 - 44:43The nautilus shell is one
of the most beautiful and intricate
structures in nature. -
44:43 - 44:46Here you can see the chambers.
This is the one where it lives -
44:46 - 44:48and these are the ones
it uses for buoyancy. -
44:48 - 44:52Now, at first sight, this looks
like a really complex shape, -
44:52 - 44:54but if I measure the dimensions
of these chambers -
44:54 - 44:57a clear pattern begins to emerge.
-
45:11 - 45:15Now there doesn't seem to be any
connection between these numbers, -
45:15 - 45:18but look what happens
when I take each number -
45:18 - 45:21and divide it
by the previous measurement. -
45:21 - 45:26If I take 3.32 and divide by 3.07,
-
45:26 - 45:28I get 1.08.
-
45:28 - 45:32Divide 3.59 by 3.32
-
45:32 - 45:35and I get 1.08.
-
45:35 - 45:39Take 3.88 and divide by 3.59
and I get, again, 1.08. -
45:41 - 45:45So every time I do this calculation,
I get the same number. -
45:45 - 45:48So although it's not clear
by looking at the shell, -
45:48 - 45:53this tells us that the nautilus
is growing at a constant rate. -
45:53 - 45:56Everytime the nautilus builds a new
room, the dimensions of that room -
45:56 - 46:00are 1.08 times the dimensions
of the previous one. -
46:00 - 46:03And it's just by following
this simple mathematical rule -
46:03 - 46:07that the nautilus builds
this elegant spiral. -
46:10 - 46:13And because many living things
grow in a similar way, -
46:13 - 46:17these spirals are everywhere.
-
46:19 - 46:24The rules nature uses to create
its patterns are found in the Code. -
46:51 - 46:56Behind the world we inhabit,
there's a strange
and wonderful mathematical realm. -
46:56 - 47:00They're actually related
to octopus, squids and cuttlefish. -
47:00 - 47:02They're quite ticklish.
-
47:06 - 47:11The numbers and connections
at its heart describe the processes
we see all around us. -
47:11 - 47:13Bear with me, all right?
-
47:17 - 47:22But the Code doesn't just contain
the rules that govern our planet - -
47:22 - 47:28its numbers also describe the laws
that control the entire universe. -
47:41 - 47:46For centuries, we've gazed out
into the night's sky -
47:46 - 47:50and tried to make sense
of the patterns we see in the stars. -
48:08 - 48:13To take a closer look, I've come
to Switzerland's Sphinx Observatory, -
48:13 - 48:19perched precariously
on the Jungfrau mountain. -
48:31 - 48:38At nearly 3,600 metres, it's one
of the highest peaks in the Alps. -
48:43 - 48:47And after the sun
has sunk below the horizon... -
48:49 - 48:52..it's a great place
to gaze at the stars. -
49:01 - 49:06Well, it's a really clear night,
so you can see loads of stars. -
49:06 - 49:09There's Sirius over here,
the brightest star in the night sky -
49:09 - 49:14and right here a really recognisable
constellation, which is Orion. -
49:14 - 49:16Have people always picked out Orion
-
49:16 - 49:19as a significant pattern
in the night sky? -
49:19 - 49:22It seems like different cultures
all picked out that group -
49:22 - 49:24as being a significant one.
-
49:24 - 49:26They all have
different legends about it. -
49:26 - 49:30The Egyptians associated it
with Osiris, their god of death
and rebirth -
49:30 - 49:33Other cultures group them together.
-
49:33 - 49:35A native American tribe
called the three stars of the belt, -
49:35 - 49:38the three footprints of the flee god.
-
49:38 - 49:43One group of the Aborigines
in Australia called it the canoe. -
49:48 - 49:52Today, we don't need legends to
explain the patterns in the stars -
49:52 - 49:57because we know
their precise positions in space. -
50:00 - 50:03And we don't just know
where they are now, -
50:03 - 50:07we know where they were yesterday
and where they'll be -
50:07 - 50:10millions of years into the future.
-
50:11 - 50:15So the Sun and all the stars in our
galaxy, including the stars in Orion, -
50:15 - 50:19are all moving in orbits
around the centre of the galaxy, -
50:19 - 50:23but like a swarm of bees,
although they're all moving
in roughly the same direction, -
50:23 - 50:27they all follow their own paths
and that means that
their positions will change, -
50:27 - 50:30as thousands of years tick by.
-
50:30 - 50:33And now we're two-and-a-half
million years in the future -
50:33 - 50:38and the constellation of Orion
has completely gone. -
50:39 - 50:44In fact, thousands of years ago
our ancestors would have seen
different patterns in the sky -
50:44 - 50:50and our descendants,
millions of years in the future,
will also see different patterns. -
50:58 - 51:03The reason we can predict how the
stars will move into the far future -
51:03 - 51:06is because we've uncovered the rules
that govern their behaviour. -
51:08 - 51:13And we've found these rules
not in the heavens, but in numbers. -
51:19 - 51:25It's only through the Code
that we can understand
the laws that govern the universe. -
51:49 - 51:53Laws that describe everything
from the motion of the planets -
51:53 - 51:55to the flight of projectile.
-
51:57 - 52:00When you watch the fireball
fly through the air -
52:00 - 52:02then it appears in the first
part of its flight, -
52:02 - 52:04when it's just left the trebuchet,
-
52:04 - 52:08that it's accelerating upwards
and then it begins to slow down, -
52:08 - 52:10before it stops just above me
-
52:10 - 52:15and then, finally, accelerates
back down towards the ground. -
52:19 - 52:22But if you analyse the flight
using numbers, -
52:22 - 52:24it reveals something
rather surprising. -
52:26 - 52:31When you plot a graph
of the projectile's vertical speed -
52:31 - 52:33against time...
-
52:34 - 52:37..you then you get a graph
which looks like this. -
52:41 - 52:44To start with,
the projectile is moving upwards -
52:44 - 52:48so it's vertical speed is positive,
but decreasing. -
52:49 - 52:53As it reaches the top of its arc,
the vertical speed becomes negative -
52:53 - 52:58as the fireball turns round
and falls back to Earth. -
53:02 - 53:06Because the graph is going like
this, it means that the projectile, -
53:06 - 53:10from the moment it leaves the
trebuchet, is actually slowing down. -
53:10 - 53:15So at no point during the flight
is it ever accelerating upwards. -
53:21 - 53:26Throughout its flight, the fireball
is accelerating downwards -
53:26 - 53:29towards the Earth
at a constant rate. -
53:31 - 53:34Something you would never realise
simply by watching it -
53:34 - 53:36fly through the air.
-
53:39 - 53:41And this is a profound truth
-
53:41 - 53:44about one of the fundamental
forces of nature... -
53:46 - 53:48..gravity.
-
53:49 - 53:53Drop, throw, fire or launch
anything you like - -
53:53 - 53:56a rock, a bullet,
a ball or even a pot plant -
53:56 - 53:59and it will accelerate towards
the ground at a constant rate -
53:59 - 54:03of 9.8 metres per second,
per second. -
54:03 - 54:06This is a fundamental law
of gravity on our planet. -
54:06 - 54:11But it's only revealed
by changing the flight path
of the object into numbers. -
54:17 - 54:21Appreciating this simple fact
about how gravity works on Earth -
54:21 - 54:26is the first step towards
understanding gravity everywhere. -
54:40 - 54:45It's the foundation stone
of Newton's Law
of Universal Gravitation. -
54:46 - 54:51A mathematical theory that can
describe the orbits of the planets, -
54:51 - 54:56predict the passage of the stars
into the distant future... -
54:59 - 55:05..and has even enabled human kind
to step foot on the Moon. -
55:09 - 55:14The laws that command the heavens
are written in the Code. -
55:26 - 55:30'We call them the door mats,
the large ones. -
55:30 - 55:33'Two-and-a-half million years
in the future... -
55:33 - 55:35'This isn't imaginery, this is real!
-
55:40 - 55:44'You don't need to know
what that means to know
that animal's not happy. -
55:44 - 55:46'Whatever circle I take,
-
55:46 - 55:49'you're going to get
a number which starts 3.14.' -
55:53 - 55:58It's an incredible thought
that the only way we can
really make sense of our world -
55:58 - 56:01is by using
the abstract world of numbers. -
56:01 - 56:05And yet those numbers have allowed
us to take our first tentative
steps off our planet. -
56:05 - 56:10They've also given us the technology
to transform our surroundings. -
56:12 - 56:15'A hidden Code
underpins the world around us. -
56:18 - 56:22'A Code that has the power
to unlock the rules that
cover the universe.' -
56:26 - 56:30This place was constructed
to satisfy a spiritual need. -
56:30 - 56:34But we couldn't have built it
without the power of the Code. -
56:34 - 56:40For me, it's an exquisite
example of the beauty
and potency of mathematics. -
56:51 - 56:54From the patterns and numbers
all around us, -
56:54 - 56:57we've deciphered a hidden code.
-
57:11 - 57:15We've revealed a strange
and intriguing numerical world, -
57:15 - 57:17totally unlike our own.
-
57:19 - 57:25Yet it's a Code that also describes
our world with astonishing accuracy. -
57:31 - 57:34And has given us
unprecedented power to describe... -
57:38 - 57:39..control...
-
57:42 - 57:44..and predict our surroundings.
-
57:57 - 58:01The fact that the Code
provides such a successful
description of nature -
58:01 - 58:04is for many one of the greatest
mysteries of science. -
58:05 - 58:09I think the only explanation
that makes sense for me -
58:09 - 58:11is that by discovering
these connections, -
58:11 - 58:15we have in fact uncovered
some deep truth about the world. -
58:15 - 58:18That perhaps, the Code
is THE truth of the universe -
58:18 - 58:23and it's numbers that dictate
the way the world must be. -
58:30 - 58:31Go to...
-
58:34 - 58:37..to find clues to help you solve
the Code's treasure hunt. -
58:37 - 58:41Plus, get a free set of mathematical
puzzles and a treasure hunt clue -
58:41 - 58:44when you follow the links
to The Open University -
58:44 - 58:46or call 0845 366 8026.
-
59:01 - 59:04Subtitles by Red Bee Media Ltd
-
59:04 - 59:07E-mail subtitling@bbc.co.uk
-
59:07 - 59:10Download Movie Subtitles Searcher from www.OpenSubtitles.org
- Title:
- The Code S01E01: "Numbers"
- Description:
-
This video is part of the InternsUK Open Source Academy selection.
We select and share funny and instructive videos, to allow everyone to access useful information and stimulate an ongoing personal development.
This is for an educational purpose only.http://www.internsuk.com/
- Video Language:
- English
- Duration:
- 59:17
Peter Rudenko edited English subtitles for The Code S01E01: "Numbers" | ||
Peter Rudenko added a translation |