From baby teeth to ‘conveyor belt’ molars, here’s why humans—and other mammals –grow and replace their teeth in such ...

Mosasaurs were enormous reptiles best known for ruling ancient oceans more than 66 million years ago, but new evidence suggests some also lived in rivers. Scientists reached this conclusion after ...

From giant stick bugs to rarely seen sea creatures, these animal videos fascinated us—and led to new scientific discoveries.

The textbook version of the "Out of Africa" hypothesis holds that the first human species to leave the continent around 1.8 ...

Teeth and bones are both hard, white and heavy with calcium, but that doesn't make them one and the same. From the way they look to how they heal, teeth are quite different from the body's bones.

Join the challenge as we dig for giant Megalodon teeth—how many will we find in this thrilling hunt? One Fernando Mendoza throw may have clinched Heisman Trophy for Indiana QB Sunday shows preview: ...