Mars is as seductive to space explorers as the sirens were to ancient mariners. The U.S., Russia, Japan and Europe have sent 40 spacecraft to explore the fourth planet from the sun since the space age began. Twenty-six have failed, yet Earthlings keep trying.
Mars Curiosity is NASA's latest and boldest attempt yet to go where robots -- but no man -- have gone before. Today it was on final approach, with touchdown scheduled for 1:31 a.m. EDT Monday. If it works.
This intrepid chemistry set...Full Story