A new study suggests that a tree-dwelling salamander may be able to control its grip on trees' bark by pumping blood in and out of the tips of its toes. This rather crafty strategy could one day be ...

All bird feet are not the same. One size does not fit all. Different birds have different jobs in this world, and their feet, one of the main tools for the work they do, have evolved to fit the task.

"Hearst Magazines and Yahoo may earn commission or revenue on some items through these links." SOMETIMES IT’S JUST too hot to wear shoes. The Romans knew it, which is why their legions marched in ...