Teeth help animals bite and chew food. Meat-eating carnivores tend to have sharp teeth to sink into their prey, while herbivores tend to have flatter teeth to grind down their plant-based meals. Some ...

Scientists have long thought humans have a uniquely difficult birth compared with other primates. And it's true that, from an evolutionary perspective, we face an obstetrical dilemma. As we evolved to ...

You walk in a park. Children are playing, people are walking their dogs, and then you hear someone: “Who’s my little sweetie?” You turn around expecting to see a pram. But someone is sitting beside a ...