来自MSN13 天
The Ridiculous Reason California Won't Use Sea Water to Put Out Fires
After nearly two weeks, firefighters in Los Angeles announced Friday that they were seeing the "light at the end of the ...
Space.com29 天
Can NASA's troubled Mars Sample Return mission be saved?
NASA wants to return Mars samples to Earth, but budget problems and technical woes have the mission caught between a rock and the Red Planet. There appears to be an unofficial robotic space race ...