Horizon goes behind the scenes at NASA as they countdown to the landing of a 2.5 billion-dollar rover on the surface of Mars. In six days time, the nuclear-powered vehicle - the size of a car - will be winched down onto the surface of the Red Planet from a rocket-powered crane. That's if things go according to plan: Mars has become known as the Bermuda Triangle of space because... 想看更多的地平线系列:火星任务 好奇 地平线 表面 NASA 2010 车于 相关地平线系列:火星任务,请关注我们的网站:www.whccic365.com
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