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Artist's impression of the planetary system around the red dwarf Gliese 581. The five Earth-mass planet (seen in foreground - Gliese 581 c) is just inside the habitable zone.

13 Ways To Hunt Intelligent Aliens

physics, innovation, invention, vortex, hydrofoil, 3-D printing

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newborn baby boy wrapped in blanket

5 Things You Didn't Know About Circumcision

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pope-benedict

Papal Primer: History's 10 Most Intriguing Popes

neurons

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woman scientists holding petri dishes

Body Bugs: 5 Surprising Facts About Your Microbiome

Internet connections

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frozen test tube

Oops! 5 Retracted Science Studies

Sea slugs mating

The 9 Weirdest Animal Penises

A group of young people holds hands.

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A woman with two men smiles.

5 Myths About Polyamory Debunked

Artists's Concept of Asteroid 2012 Da14

5 Reasons To Care About Friday's Asteroid Flyby

Artist’s impression of a 6-mile-wide asteroid striking the Earth.

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The Great Blizzard of 1888

The 10 Worst Blizzards In Us History

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