The windblown plains of Mars are covered by red sand dunes and jagged rocks. They resemble the deserts of southwestern North America. This photo of Mars's surface was taken in 1976 by the U.S. Viking 1 space probe. A part of the probe's equipment appears in the center.
<BR><P>
NASA</P>
</BODY></P>
<!-- <PT>YES -->
<!-- <AR>From The World Book Multimedia Encyclopedia (TM) (c) «date» World Book, Inc., 525 W. Monroe, Chicago, IL 60661. All rights reserved. -->