Discover the truth about life on Mars in this level 2 reader! Mars is a cold, desert planet with no water. But it wasn't always like this. Could there once have

Looks at the history of Mars, summarizes our current knowledge, based in part on the Mariner and Viking space probes, compares its features with Earth's, and di

Molly helps her best friend find a new pet! In this Level 2 reader series, a magic charm bracelet lets Molly speak to animals! In this book, Molly helps her bes

Molly's magic charm bracelet is missing! In this Level 2 reader series, a magic charm bracelet lets Molly speak to animals! In the third book, Molly's bracelet

A basic introduction to the sun.