大象传媒 World Service - The Forum, Peering into Space at Aspen Ideas Festival, Can we avoid becoming 鈥榙inosaur toast鈥�? Asteroid hunter and former NASA astronaut Edward Lu. Photo 漏 aspeninstitute-internal

Can we avoid becoming 鈥榙inosaur toast鈥�? Asteroid hunter and former NASA astronaut Edward Lu. Photo 漏 aspeninstitute-internal

There are about a million sizeable asteroids, each capable of wiping out a big city.

04 July 2013

1 minute