NASA's Voyager probes are the only spacecraft to reach interstellar space. However, Voyager 1 is going to achieve another ...
Live Science on MSN
What if Christopher Columbus had never reached the Americas?
Columbus wasn't the first European to reach the Western Hemisphere; the Vikings had landed in Newfoundland about 500 years ...
As ancient humans left Africa, they encountered many harsh environments including the Sahara and the high Arctic, but one of ...
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