Watch Out, Mars, We Took You Out Once Before And We Can Do It Again Without Even Trying

In old movies, humans feared invaders from other planets, but they had better watch out for us. In "War of the Worlds" we took out the Martians using nothing but microorganisms, so if imagine if we really tried. Interplanetary exchange of organisms is little discussed in a summer movie world of "Independence Day" invaders, but three recent scientific papers examined the risks using research from the International Space Station. read more

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