Seven Earth-like Planets Were Just Discovered Orbiting A Nearby StarThese planets are the size of Earth, could have water...and maybe even life.
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Scientists Just Spotted Something In Deep Space That Might Change Everything We KnowDoes this mean an alien invasion is near?
A Series of Periodic Mass Extinctions on Earth Might Be Caused by 'Planet X'Every 27 million years, the Earth's population is drastically reduced. Could Planet X offer the explanation?