Your teeth wouldn’t do much against a woolly mammoth. But a saber-toothed cats’ teeth — those were perfectly evolved to take down such giant prey. All animals’ teeth evolved to help them survive.

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., ...