Since the dawn of time, roughly 99 percent of all species have become extinct. In order to survive, all creatures, including man, must treat life as a battlefield and master the natural weapons and defences that they have evolved: Tyrannosaurus Rex's 13-inch canines; the gecko’s Velcro-like toe pads; the bald eagle’s telescopic vision capable of spotting a hare a mile away.
How did these attributes, each unique to the organism itself, appear? Certainly not arbitrarily. They evolved for a common reason - to give these animals a critical edge in interspecies warfare, and to ensure the survival of the individual’s genes into the next generation. To evolve is to survive.
In this instalment of Evolve, we open wide to examine the history of the jaw. It's one of the most important developments in the history of life. An adaptation that lets animals kill, butcher, and devour. There is perhaps no instrument more important to survival than a strong set of jaws.
From the shark's rows of razor-sharp serrated teeth, the crocodile's overwhelmingly swift-snapping-trap, to the lion's shredding canines, all have evolved in response to the never-ending struggle between predator and prey. But just how did these ultimate killing weapons develop in the first place?
Producers: Kurt Tondorf & Kate Walker
Narrator: Gareth Armstrong
File Size: 349 MB
Video Length: 00:44:48
Video Codec: XviD
Video Resolution: 624x352
VIdeo Bitrate: 1066 kbit/s
Audio Bitrate: 123 kbit/s
Audio Codec: MPEG Layer-3