PBS NOVA: Last Extinction (HD)

Approximately 13,000 years after the mighty mammoth and 35 other groups of mammals vanished from North America, some scientists pose the controversial theory that a massive impact from space may have heralded their demise.
For the past four decades, experts have been at odds over what causes this mass extinction. While mainstream scholars pose that the changing climate or ancient hunters were likely to blame for driving the beasts into oblivion, others believe that a comet from deep space may have broken up over North America.
This would have caused a devastating series of explosions that decimated the landscape, and wiped out animal populations.
The proof, they claim, lies in the discovery of a mysterious black mat layer at over fifty sites across the continent. The materials found in the “black mats” include rare, microscopic “nanodiamonds,” which are thought to be the product of extraterrestrial impact. In this documentary, filmmakers pose that perhaps all three theories share an common element of truth.
General
Complete name : Nova: Last Extinction.MP4
Format : MPEG-4
Format profile : Base Media / Version 2
Codec ID : mp42
File size : 912 MiB
Duration : 52mn 19s
Overall bit rate : 2 437 Kbps
Encoded date : UTC 2012-01-18 10:46:02
Tagged date : UTC 2012-01-18 10:46:02
gsst : 0
gstd : 3139313
gssd : BD075FC44HH1329607391891188
Video
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Format : AVC
Format/Info : Advanced Video Codec
Format profile : High@L3.1
Format settings, CABAC : Yes
Format settings, ReFrames : 1 frame
Format settings, GOP : M=1, N=60
Codec ID : avc1
Codec ID/Info : Advanced Video Coding
Duration : 52mn 19s
Bit rate mode : Variable
Bit rate : 2 282 Kbps
Maximum bit rate : 10.4 Mbps
Width : 1 280 pixels
Height : 720 pixels
Display aspect ratio : 16:9
Frame rate mode : Constant
Frame rate : 29.970 fps
Color space : YUV
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Scan type : Progressive
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Stream size : 854 MiB (94%)
Tagged date : UTC 2012-01-18 10:47:33
Audio
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Format : AAC
Format/Info : Advanced Audio Codec
Format profile : LC
Codec ID : 40
Duration : 52mn 19s
Bit rate mode : Variable
Bit rate : 152 Kbps
Maximum bit rate : 197 Kbps
Channel(s) : 2 channels
Channel positions : Front: L R
Sampling rate : 44.1 KHz
Compression mode : Lossy
Stream size : 56.9 MiB (6%)
Title : IsoMedia File Produced by FreeYay, 2-20-2012
Encoded date : UTC 2012-01-18 10:46:51
Tagged date : UTC 2012-01-18 10:47:33