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From Dav Pilkey, the worldwide bestselling author-illustrator of Dog Man, and award-winning illustrator Dan Santat comes an out-of-this-world frien...

Find out all about NASA in this out-of-this-world addition to the What Was? series. The National Aeronautics and Space Administration, better known...

Readers will want to grab a telescope and explore the night skies after finishing this overview of our solar system.Our solar system consists of ei...

In 1978, Sally Ride, a PhD candidate at Standford University, responded to a newspaper ad to join the US astronaut program. She was accepted and be...