8-9 years

Discover the fascinating world of inventions and technology. From the first tools to the latest gadgets, Pocket Genius: Inventions showcases key in...

Explore all the wonders of the ocean in one pocket-sized reference guide!From colossal whales to microscopic plankton, our vast oceans are teeming ...

From marvelous galleries of the Big Dipper, Little Dipper and other constellations to in-depth looks at Mercury, Venus, Earth, Mars, Saturn, Uranus...

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...

A mesmerizing overview of the world as it was when glaciers covered the earth and long-extinct creatures like the woolly mammoths and saber-toothed...

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...

Isaac Newton was always a loner, preferring to spend his time contemplating the mysteries of the universe. When the plague broke out in London in 1...

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...