Astro the Alien and his friends Ben and Eva visit and learn about ocean animals, including animals that live near coral reefs, in the deep ocean, and in tide po

Astro the Alien and his friends Ben and Eva find a frog in their back yard. They follow the frog to its pond, where they visit and learn about pond animals, inc

When Astro the Alien sees his friend Eva’s stuffed polar bear, he wants to learn all about polar animals. Astro, Eva, and her brother Ben use Astro’s space

This book addresses important current and historical topics in astrobiology and the search for life beyond Earth, including the search for extraterrestrial inte