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Proof of “planet nine” may be sewn into medieval tapestries

Planet Nine, if it exists, would have about 10 times the mass of Earth & orbit 20 times farther from the sun than Neptune does

There’s only so much time left to look for life on Mars before life arrives from Earth

The 51-year-old Outer Space Treaty, which obligates the U.S. and other signers to avoid the “harmful contamination” of other celestial bodies

Beyond the Milky Way: The sublime beauty of our galactic neighbors (AMAZING PHOTOS)

A trip through some of humanity's most spectacular galactic glimpses

Global Warming: A new study could destroy Doomsday Climate Change forecasts

With more nitrogen available, plant life may absorb more CO2 than estimated, hence the planet won't warm as much

This is the oldest human object in space (PHOTOS)

Making the first roadmap for space

Aliens could be living in the acid clouds of Venus

Life can thrive in very acidic conditions, can feed on carbon dioxide, and produce sulfuric acid

Tiangong-1 space station burns up over the Pacific

it's possible that as much as 20 percent of it could have reached the Earth's surface

This map shows where you’d pop up if you dug straight through the Earth!

Finally, the answer to the question we have all asked at some point in our childhood

Leading expert at SETI says we’ll discover alien life by the end of this century

People who believe in the singularity of the human race might be in for a shock

Chinese space station set to plummet uncontrolled back to Earth

The odds you will be hit are about 1 million times smaller than the odds of winning the Powerball jackpot

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