randall munroe
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The only way to evacuate all of humanity from Earth is to use nuclear propulsion
Yes, it is awesome the Curiosity rover can Instagram Mars pics back to Earth from 50 million miles away. But ultimately, one goal of all this space exploration is to have another place to go if we really royally screw up the planet, right? XKCD’s Randall Munroe answers a critical question about that overplayed movie […]