Design a fuel-efficient car, win $5 million

From The New York Times:

Teams from Virginia, North Carolina and Winterthur, Switzerland, with roots in the world of auto racing have won the First Progressive Insurance Automotive X Prize, the $10 million competition aimed at advancing the technology for more fuel-efficient vehicles.

The competition, which began in 2007 with 136 vehicles from 111 teams, required that the vehicles achieve 100 miles per gallon or the energy equivalent. While two of winning vehicles reached that goal with electric power plants, the top winner did it with an internal combustion engine.