UPDATED 20:03 PM EST, November 15, 2012
SANTIAGO, Chile (AP) — The second annual Solar Challenge has begun in Chile's Atacama desert, where 15 solar-powered cars rolled out of an old salt mine Thursday.
The solar-powered prototypes will travel more than 800 miles (1,300 kilometers) through the world's driest desert in the four-day, multinational race.
There are two categories: cars powered only by solar energy, and three-wheeled models that get a little help from pedals pushed by the drivers themselves.
