Add Yahoo as a preferred source to see more of our stories on Google. A Texas angler caught a South American piranha relative with "human teeth" at a local lake Sunday. The a-pacu-lypse is upon us. As ...

Curious Kids is a series for children of all ages. If you have a question you’d like an expert to answer, send it to curiouskidsus@theconversation.com. Why do people have two sets of teeth? – Ivy D., ...

The toothlike structures represent a step toward bioengineered replacements for dental implants, say researchers behind the work. Lose an adult tooth, and you’re left with limited options that ...