Mars

= Mars = == Mars is the fourth planet from the sun. It is 141,732,000 miles away from the sun. On Mars there is a Grand Canyon that is bigger than Arizona’s Grand Canyon. It is a very rocky planet that has volcanoes. Mars has a small atmosphere that does not have enough air to breathe. Astronomers think life could have existed on Mars because carbon dioxide and fossils were discovered on the planet. We think life could have existed on Mars.  Abby and Grace