The Argentinosaurus may have been as long as three school buses.

Crayons were first sold in 1903 in a box of eight colors.

Chocolate comes from the seeds of the cacao tree.

Octopuses can change the color of their skin in less than a second.

Penguins can't fly, but they are amazing swimmers.

There are more stars in the universe than grains of sand on all of Earth's beaches.

Kids have 20 baby teeth, and adults usually have 32 teeth.