Animals, from worms and sponges to jellyfish and whales, contain anywhere from a few thousand to tens of trillions of nearly genetically identical cells. Depending on the organism, these cells arrange ...

A group of teeny tiny mouse-deer in the family Tragulidae numbers 10 species that live in warmer parts of Southeast Asia, India, and Africa. They are small, delicate, and extremely elusive: they are ...

In the animal kingdom, some creatures live incredibly short lives, ranging from a few hours to a week. These species, ...

Sloths weren’t always the slow, tree-hugging creatures we know today. For millions of years, they came in a wild variety of ...

The animal kingdom showcases diverse vocalizations crucial for survival and communication. Blue whales use low-frequency moans across vast ocean distances, while howler monkeys boom through ...

Biologists have confirmed the existence of a 200-million-year-old species of egg-laying mammal that has been assumed to be ...