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B1 Intermédiaire Anglais 7:24 Educational

Cosmos - Carl Sagan - 4th Dimension

carlsagandotcom · 4,892,588 vues · Ajouté il y a 2 mois

Statistiques d apprentissage

B1

Niveau CECRL

5/10

Difficulté

Sous-titres (154 segments)

00:03

in discussing the large scale structure

00:06

of the cosmos astronomers sometimes say

00:08

that space is

00:11

curved or that the universe is finite

00:15

but

00:16

unbounded whatever are they talking

00:19

about let's imagine that we are

00:21

perfectly flat I mean absolutely flat

00:25

and that we live appropriately enough in

00:27

a flat land a

00:30

land designed and named by Edwin Abbott

00:34

a Shakespearean scholar who lived in

00:36

Victoria in England everybody in

00:38

flatland is of course exceptionally flat

00:41

we have squares circles triangles and we

00:44

all Scurry about and we can go into our

00:48

houses and do our flat business now

00:54

we have width and length but no height

00:59

at at all now these little cutouts have

01:02

some little height but let's ignore that

01:04

let's imagine that these are absolutely

01:06

flat that being the case we know us

01:10

Flatlanders about left right and we know

01:13

about forward back but we have never

01:16

heard of up down let us imagine that

01:20

into flatland hovering above it comes a

01:24

strange three-dimensional creature which

01:27

oddly enough looks like an apple and the

01:30

three-dimensional creature sees an

01:32

attractive congenial looking Square

01:36

watches it enter its house and decides

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