Ancient, fossilized teeth, uncovered during a decades-long archaeology project in northeastern Ethiopia, indicate that two different kinds of hominins, or human ancestors, lived in the same place ...

Sharks and crocodiles grow endless sets of teeth, but humans only get two. Explore how teeth develop and how regenerative ...

The Carl Sagan quote “we’re made of star stuff” is not only poetic, but also quite accurate. All the elements found in the human body were once forged in the cosmos and can still be found lingering ...