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 been living things there? Find out in this new level 2 reader all about life on Mars. Includes the most stunning and up-to-date photographs from NASA.
Author Biography
Mary Kay Carson writes science news and educational materials for students and teachers. Mary Kay lives in Cincinnati, Ohio.
