A group of crows is called a murder, and a group of kangaroos is called a mob.

A baby giraffe can stand up within about an hour of being born.

The Moon is slowly moving away from Earth — about 1.5 inches every year.

Jupiter has a giant storm called the Great Red Spot that is bigger than Earth.

A single oak tree can produce thousands of acorns in one year.

The Nile and the Amazon are the two longest rivers in the world.

Dinosaurs lived on Earth for more than 160 million years.