Ages 7-9. This spectacular reference book for children aged 7-9 explores the planet Mars, exploring the evidence for past life on Mars, what's happening there now, and what it might look like to one day live on the Red Planet. Be amazed by the tallest mountain in the Solar System, discover how houses on Mars could look, and find out if you've got what it takes to join the teams traveling to Mars in the future. 80 pages hc