This page is the start of the tour which compares the surfaces of Earth and Mars. In this tour we will describe and compare some features of the surfaces of both Earth and Mars. Use the navigation button at the top right of the page to move through the tour. To go to the next page, just press the forward link on the navigation button.
Mars is much smaller than the Earth, with a diameter 53% as large as Earth and a mass of about 11% that of our planet. It has no oceans, trees or other visible forms of life on the surface. We will show in this tour, however, that Mars has many of the biggest things in the solar system - the biggest volcano, the deepest chasm, and the biggest canyon.