Why a Greyhound or a Racehorse Doesn't "Pop a Wheelie"
Researchers wondered whether the “wheelie” problem experienced by cars during a drag race could be a factor in four-legged animals’ ability to speed up. They came up with a simple mathematical model… to see how fast a quadruped could accelerate ...
Birds' "Crouching" Gait Born in Dinosaur Ancestors
Watch a bird's odd, bent-legged gait and you'll see an evolutionary adaptation born millions of years ago in its dinosaur ancestors while they ... If you look at an ostrich or an emu, you'll see a femur that's almost horizontal and very short."
The Fastest Human-Like Robot Has Creepy Knees and a 9-Minute Mile
MABEL is a biped bot, which means she’s probably less stable than a quadruped, but more able to potentially stand in for humans in activities like climbing stairs (and certainly a more useful instance of human biomimicry than some robots we could name).
Sauropod dinosaurs held their necks in high, raised postures
Taylor, Mathew Wedel and myself in which we make a bold and controversial claim: based on data from living animals, we contend that the necks ... of the head-neck movement system of quadrupedal and bipedal mammals. Journal of Anatomy 186, 55-74.
Living the Scientific Life (Scientist, Interrupted)
The animal is repeatedly chased and tracked down until it is too exhausted to continue running. The hunter then kills it at close range with a spear. Narrated by David Attenborough.