1 of 7Image
Stuck in clouds and rainSolar cars "raycing" in the North American Solar Challenge found clouds and rain to be more of a hazard than traffic and potholes. The U.S. Department of Energy is the main sponsor of this 2,500-mile race from Austin, Tex., to the finish in Calgary, Alberta, on July 27. Cars are powered only by sunshine.
Here, the University of Michigan team loses its lead near Burlington, Kan., after heavy rains and clouds force team members to stop and recharge their car's batteries.
The team from MIT took the lead by driving slower and conserving energy as the clouds and rain darkened the sky. The team is currently in third place after 1,633 miles. Cars are tracked by wireless GPS devices. Their progress can be followed on the solar raycing site.