Behold the cynodont. (Sounds like: sign-uh-daunt.) Cynodonts gave rise to all living mammals about 250 million years ago. Or so. These...

By Jon Zahourek Vertebrate Anatomy is a System of Subsystems The key to vertebrate movement is the axial subsystem. If you own a...

The world is marked by dividing lines—continents, countries, states, cities, towns, etc. And the same holds true for the people who live...