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BBC - Light and Dark (2013)

Posted By: notbanned
BBC - Light and Dark (2013)

BBC - Light and Dark (2013)
PDTV | 832x468 | .MKV/AVC @ 1592 Kbps | 2x~59min | Audio: English AAC 128 kbps, 2 channels | Subs: English | 1.26 GiB
Genre: Documentary

Professor Jim Al-Khalili shows how scientists have used light to reveal almost everything we know about the universe.
Part 1: Light
The story begins in the 3rd century BC when, by trying to understand the tricks of perspective, the Greek mathematician Euclid discovered that light travels in straight lines, which meant that if we could change its path we could change how we see the world. In Renaissance Italy 2,000 years later, Galileo Galilei did just that by using the lenses of his simple telescope to reveal our true place in the cosmos. In the 1670s, the Danish astronomer Ole Roemer discovered that light travelled at a finite speed, a discovery that had a profound implication. It meant the further one looks out into the universe, the further one looks back in time. And in 1964, by detecting the cosmic microwave background, the afterglow of the big bang, we captured the oldest light in the universe and saw as far back as its possible to see with light.

Part 2: Dark
Professor Jim Al-Khalili tells the story of how we went from thinking we were close to a complete understanding of the universe to realising we had seen almost none of it. Today, our best estimate is that more than 99 per cent of the cosmos is hidden in the dark, invisible to our telescopes and beyond our comprehension. The first hints that there might be more out there than meets the eye emerged from the gloom in 1846 with the discovery of the planet Neptune. It was hard to find, because there was precious little light to illuminate it. In the middle of the 20th century scientists discovered dark matter - stuff that wasn't just unseen, it was fundamentally un-seeable. In the late 1990s scientists trying to measure precisely how much dark matter there was in the universe discovered something even more elusive out there - dark energy, a mysterious new force driving the universe apart that is thought to make up a colossal 73 per cent of it.


General
Unique ID : 212314193747816454848394998552321904856 (0x9FBA39F1238503819006D962E0F0D0D8)
Complete name : BBC.Light.and.Dark.1of2.mkv
Format : Matroska
Format version : Version 4 / Version 2
File size : 677 MiB
Duration : 59mn 27s
Overall bit rate : 1 592 Kbps
Encoded date : UTC 2013-11-25 18:44:27
Writing application : mkvmerge v6.5.0 ('Isn't she lovely') built on Oct 20 2013 12:50:05
Writing library : libebml v1.3.0 + libmatroska v1.4.1

Video
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Format settings, CABAC : Yes
Format settings, ReFrames : 4 frames
Codec ID : V_MPEG4/ISO/AVC
Duration : 59mn 27s
Width : 832 pixels
Height : 468 pixels
Display aspect ratio : 16:9
Frame rate : 25.000 fps
Color space : YUV
Chroma subsampling : 4:2:0
Bit depth : 8 bits
Scan type : Progressive
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Language : English
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Audio
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Format : AAC
Format/Info : Advanced Audio Codec
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Codec ID : A_AAC
Duration : 59mn 27s
Channel(s) : 2 channels
Channel positions : Front: L R
Sampling rate : 48.0 KHz
Compression mode : Lossy
Delay relative to video : 9ms
Language : English
Default : Yes
Forced : No

Text
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Codec ID : S_TEXT/UTF8
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Language : English
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Screenshots:

BBC - Light and Dark (2013)

BBC - Light and Dark (2013)

BBC - Light and Dark (2013)

BBC - Light and Dark (2013)