You may not see a Portuguese man-of-war when you're swimming in the ocean. Yet that doesn't mean ...

Sea stars don't have a head or a brain, yet they are still able to hunt for food. How? The answer...

Theaters are fun places to visit-most of the time. These beautiful buildings are usually filled w...

A hippo's mouth is huge, measuring about four feet (1.2 m) from top to bottom when open. That's b...

Fireflies aren't the only animals with the power to glow in the dark. In this book, young readers...

Three-toed sloths have a clever way of protecting themselves from nature's fiercest predators. Sl...

Scientists have found the bones of many small, pet-sized dinosaurs. Some of them, such as Sinosau...

The peregrine falcon is the fastest animal in the world. It can fly at a speed of 68 miles per ho...

In Ostrich, young readers follow ostriches living in the savannahs of Africa as they learn about ...

A huge spider pokes two hairy legs out of a hole in the sandy soil. The opening leads to the tara...

Gravity is an invisible yet powerful force that pulls people, animals, and objects down to the gr...

Jellyfish don't have eyes. They don't have brains, either. So how do they catch food and stay saf...