NOVA S30E16 Secret of Photo 51 mp4

The discovery of the "double helix" DNA structure by James Watson, Francis Crick and Maurice Wilkins - which won the Nobel Prize in 1962 - ranks as the single most formidable scientific discovery in modern history. Yet in retrospect, the events are bittersweet, for beneath lies buried a tragic irony: Watson, Crick and Wilkins might never have reached their conclusions (or, at least, reached the conclusions as early as they did) without a massive contribution from a crystallographer and molecular biologist named Rosalind Franklin - a contribution that went publicly uncredited and undocumented. Franklin made the fateful decision to share one of her pivotal X-ray photographs of an inner molecular structure to the deputy director of her lab, Wilkins - who then, without Franklin's knowledge, casually revealed the image (known as 'Photograph 51') to Watson and Crick. The photograph led the men directly to the double helix. Tragically, by the time that Watson, Crick and Wilkins received the Nobel, Franklin had died of cancer - without ever grasping her contributions to these events.

Now, the episode of the popular PBS series Nova, entitled DNA - Secret of Photo 51, revisits Franklin's contributions and reveals, for the first time, just how dramatic and impacting they were. The program includes interviews with Wilkins; Franklin's PhD student, Raymond Gosling; and Nobel Prize winner Sir Aaron Klug, who delves into Franklin's journals for a revelation of just how close she herself came to making the Watson-Crick breakthrough. The program is based loosely on Brenda Maddox's biography of Franklin, {-Rosalind Franklin: The Dark Lady of DNA}.



Format : MPEG-4
Format profile : Base Media
Codec ID : isom
File size : 291 MiB
Duration : 56mn 53s
Overall bit rate mode : Variable
Overall bit rate : 715 Kbps
Encoded date : UTC 2010-06-09 22:49:06
Tagged date : UTC 2010-06-10 22:49:26

Video
ID : 1
Format : AVC
Format/Info : Advanced Video Codec
Format profile : High@L3.1
Format settings, CABAC : Yes
Format settings, ReFrames : 4 frames
Codec ID : avc1
Codec ID/Info : Advanced Video Coding
Duration : 56mn 53s
Bit rate : 602 Kbps
Maximum bit rate : 2 015 Kbps
Width : 640 pixels
Height : 480 pixels
Display aspect ratio : 4:3
Frame rate mode : Constant
Frame rate : 29.970 fps
Color space : YUV
Chroma subsampling : 4:2:0
Bit depth : 8 bits
Scan type : Progressive
Bits/(Pixel*Frame) : 0.065
Stream size : 245 MiB (84%)
Writing library : Vimeo Encoder
Encoded date : UTC 2010-06-09 22:49:06
Tagged date : UTC 2010-06-09 22:49:23

Audio
ID : 2
Format : AAC
Format/Info : Advanced Audio Codec
Format profile : LC
Codec ID : 40
Duration : 56mn 53s
Bit rate mode : Variable
Bit rate : 110 Kbps
Maximum bit rate : 145 Kbps
Channel count : 2 channels
Channel positions : Front: L R
Sampling rate : 44.1 KHz
Compression mode : Lossy
Stream size : 44.6 MiB (15%)
Encoded date : UTC 2010-06-09 22:49:13
Tagged date : UTC 2010-06-09 22:49:23