7-8 years

Learn more about what climate change means and how it's affecting our planet.The earth is definitely getting warmer. There's no argument about that...

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...

Travel back to the time when the mighty dinosaurs ruled the earth.The Age of Dinosaurs began about 250 million years ago. In the beginning they wer...

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...

A life in the wild! Jane Goodall, born in London, England, always loved animals and wanted to study them in their natural habitats. So at age twent...

Like Michelangelo, Galileo is another Renaissance great known just by his first name--a name that is synonymous with scientific achievement. Born i...

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...

Get ready for the electrifying biography of Nikola Tesla--part creative genius, part mad scientist, and 100% innovator.When Nikola Tesla arrived in...