Gliders can go great distances for free, by riding high on spiraling
columns of warm air called thermals. NASA recently tested an autonomous
UAV that extends its range and flight time by finding and ridingthermals.
Jay Garmon has a vast and terrifying knowledge of all things obscure, obtuse, and irrelevant. One day, he hopes to write science fiction, but for now he'll settle for something stranger -- amusing and abusing IT pros. Read his full profile. You can also follow him on his personal blog.