The animal kingdom stretches anatomy far beyond human expectations. Some creatures carry organs that rival furniture in size, ...

"Hearst Magazines and Yahoo may earn commission or revenue on some items through these links." A sliver of what makes sharks so intriguing comes with their ability to regrow teeth. And while a group ...

Scientists in Ethiopia unearthed pieces of 2.65 million-year-old fossilized teeth belonging to two members of a newly discovered Homo species that could challenge previously accepted understandings of ...

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 ...