Another company joined the commercial space race Tuesday with ambitious plans to mine asteroids near Earth, but experts say the physics and economics of the Final Frontier remain still daunting.
CNN.com - Top Stories, CNN
Tue, 01/22/2013 - 6:48pm
Another company joined the commercial space race Tuesday with ambitious plans to mine asteroids near Earth, but experts say the physics and economics of the Final Frontier remain still daunting.