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It's now thought that perhaps around 85%
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Secrets of Size: Atoms to Supergalaxies

It's now thoughtthat perhaps around 85% of all the matter in the universe is composed of...

It's now thought
that perhaps around 85% of all the matter in the universe is composed of what's known
as dark matter

Full Transcript

00:00:01.000 --> 00:00:04.559
It's now thought that perhaps around 85%
00:00:04.056 --> 00:00:06.999
of all the matter in the universe
00:00:07.000 --> 00:00:10.599
is composed of what's known as dark matter.
Duration
11 seconds
Views
22
Timestamp in Movie
00:27:47
Uploaded
May 06, 2025
Season
1
Episode
2
Genres
documentary

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Movie Summary

In this mind-bending series, Jim Al-Khalili explores the vast range of size in the universe, from tiny atoms to gigantic, interconnected galaxies.
S01 • E01 But we need our atomic force microscope to be able to see - Secrets of Size: Atoms to Supergalaxies 00:05
But we need our atomic force microscope to be able to see
S01 • E01 So, E coli are really good at resisting antibiotics - Secrets of Size: Atoms to Supergalaxies 00:18
So, E coli are really good at resisting antibiotics
S01 • E02 We can't detect it directly, - Secrets of Size: Atoms to Supergalaxies 00:07
We can't detect it directly,
S01 • E02 Most cosmologists now think our galaxy is surrounded - Secrets of Size: Atoms to Supergalaxies 00:11
Most cosmologists now think our galaxy is surrounded
S01 • E01 So this is the full cell? The full bacteria? Yeah. - Secrets of Size: Atoms to Supergalaxies 00:05
So this is the full cell? The full bacteria? Yeah.
S01 • E02 Some estimates say it could be up to two million light years across. - Secrets of Size: Atoms to Supergalaxies 00:06
Some estimates say it could be up to two million light years...
S01 • E01 So you can sort of start to see features on the surface. - Secrets of Size: Atoms to Supergalaxies 00:06
So you can sort of start to see features on the surface.
S01 • E02 The light we can see with our own eyes - Secrets of Size: Atoms to Supergalaxies 00:08
The light we can see with our own eyes
S01 • E01 And these are already well below optical microscopy kind of sizes. - Secrets of Size: Atoms to Supergalaxies 00:06
And these are already well below optical microscopy kind of ...
S01 • E01 Right. My scan's going to be 500 nanometres wide. - Secrets of Size: Atoms to Supergalaxies 00:05
Right. My scan's going to be 500 nanometres wide.
S01 • E02 That's because many astronomical objects give off radiation - Secrets of Size: Atoms to Supergalaxies 00:10
That's because many astronomical objects give off radia...
S01 • E01 So we're now looking at the surface of the bacteria? Yes. Yes. - Secrets of Size: Atoms to Supergalaxies 00:04
So we're now looking at the surface of the bacteria? Ye...
S01 • E01 This is really impressive. - Secrets of Size: Atoms to Supergalaxies 00:04
This is really impressive.
S01 • E01 What we're looking at here is bacteria skin - Secrets of Size: Atoms to Supergalaxies 00:14
What we're looking at here is bacteria skin
S01 • E02 On this end you have gamma rays, - Secrets of Size: Atoms to Supergalaxies 00:06
On this end you have gamma rays,
S01 • E02 Then X-rays and then ultraviolet. - Secrets of Size: Atoms to Supergalaxies 00:04
Then X-rays and then ultraviolet.
S01 • E02 On this side you have infrared radiation - Secrets of Size: Atoms to Supergalaxies 00:11
On this side you have infrared radiation
S01 • E01 Each one of these black spots is a hole on the bacteria, - Secrets of Size: Atoms to Supergalaxies 00:10
Each one of these black spots is a hole on the bacteria,
S01 • E02 And this slice in the middle, this is visible light. - Secrets of Size: Atoms to Supergalaxies 00:04
And this slice in the middle, this is visible light.
S01 • E01 These are the holes that let water and nutrients - Secrets of Size: Atoms to Supergalaxies 00:08
These are the holes that let water and nutrients