The more scientists study the Red Planet, the more they find unusual objects and patterns scattered across Mars' surface. Here are some of the most baffling.
If you’re watching from home, you can catch the race live on ESPN2 and in Spanish on ESPN3 from 8 a.m. to 11:30 a.m. Eastern time. In New York, it will air locally on WABC-TV, Channel 7, from 8 a.m.