The relationship between a physical attribute and sexual attraction can be established when a physical attribute gets passed on through generations to become commonplace in a species. If the attribute ...

Natural history is a difficult thing to conceptualize. You’ve got eons of undocumented progress, like the evolution of many species. Take, for example, the Australopithecus, an ancient great ape ...

These files consist of 3D scans of historical objects in the collections of the Smithsonian and may be downloaded by you only for non-commercial, educational, and ...

Dated to about 1.5 million years ago, the bones display a long robust thumb, short fingers and a mobile little finger, hinting at tool use and precision grips beyond the genus Homo.