• Mysterious cosmic rays constantly bombard Earth from outer space. Now scientists find these energetic particles could limit where life as we know it might exist on alien planets.
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  • Prior attempts to look for alien laser signals concentrated on isolated and intense bursts of light. Now scientists are focusing on repetitive but much fainter laser signals received over a longer amount of time.
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  • NASA plans to send the first humans to Mars sometime in the next quarter-century. Such a mission will push the boundaries of teamwork for the handful of astronauts selected, so scientists are developing devices aimed at monitoring astronauts to learn how cooperation fluctuates over the
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  • Scientists have found that a common antifreeze compound that might exist on Saturn's moon Titan can get trapped within ice-like cages. This discovery could influence our ideas about the evolution and development of life on Titan and other icy celestial bodies.
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  • Research that sheds light on how Australian opals formed indicates the red dirt in the land Down Under might be similar to the red surface of Mars.
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  • A new study finds that planets orbiting white or brown dwarfs are unlikely to be habitable for life as we know it.
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  • The Icebreaker Life mission to Mars, currently being developed, would drill down about 3 feet and scan the ice shavings for organic biomarkers — molecules that are too complex to be produced non-biologically and could be conclusive evidence of life.
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  • Some alien worlds orbiting red dwarf stars might resemble giant eyeballs. Researchers are now proposing experiments to simulate these distant planets and see how capable they are of supporting life.
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  • For the first time, scientists find that microbes from Earth can survive and grow even in the mix of drastically low pressure, freezing temperatures and oxygen-starved conditions seen on Mars.
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  • Chemicals such as those found in hairspray might one day serve as signs that aliens have reshaped distant worlds, researchers say.
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