Search For Life

How to Find 'Strange Life' on Alien Planets
Super-Earth GJ 1214b
August 28th, 2015
A team of scientists determined that signs of non-Earth-like life could be identified more easily on exoplanets orbiting stars producing relatively low amounts of radiation — but even then only if everything worked out just right.
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Earth-Like Alien World Could Have Vast Oceans
August 17th, 2015
A tilted orbit and a thick atmosphere could help a distant super-Earth hold onto oceans of water, making it a possible location for life to evolve.
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SETI Targets Kepler-452b, Earth's 'Cousin,' in Search for Alien Life
Kepler-452b in Orbit
July 31st, 2015
Scientists with the SETI (Search for Extraterrestrial Intelligence) Institute have already begun targeting Earth's older cousin, Kepler 452b, the first near-Earth sized world found in the habitable zone of a sun-like star.
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Sampling Enceladus: Is Earth Ready for Pieces of Saturn Moon's Plumes?
Plumes of Enceladus Image
August 27th, 2015
Many astrobiologists are champing at the bit to bring samples back from Saturn's ocean-harboring moon Enceladus, but it may be best to exercise a little patience.
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The 6 Most Earth-like Alien Planets
Exoplanets Kepler Artist's Impression
August 6th, 2015
Here's a rundown of the six exoplanets NASA regards as the most Earth-like alien worlds discovered to date.
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Closest Rocky Alien Planet Discovered
Rocky Planet HD 219134b Illustration
July 30th, 2015
The alien planet, called HD 219134b, is about 4.5 times more massive than Earth, making it a so-called "super Earth." HD 219134b lies extremely close to its host star, completing one orbit every three days, so its surface is too hot to harbor life.
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NASA Finds Closest Earth Twin Yet in Haul of 500 Alien Planets
This artist's illustration depicts what the exoplanet Kepler-452b, an Earth-size world orbiting a star like Earth's sun, may appear. NASA's Kepler Space Telescope detected the planet, which appears to be a bigger, older cousin of Earth.
July 23rd, 2015
NASA's planet-hunting Kepler space telescope has spotted more than 500 new potential alien planets, including an Earth-like planet amid a dozen that may be capable of supporting life.
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Giant Galaxies May Be Better Cradles for Habitable Planets
Artist's Depiction of Milky Way
August 21st, 2015
Galaxies like the Milky Way may not be the best cradles of life in the universe — giant galaxies devoid of newborn stars and at least twice as massive as the Milky Way could host 10,000 times more habitable planets, researchers say.
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Is That Really Alien Life? Scientists Worry Over False-Positive Signs
Habitable-Zone Planets Similar to Earth
August 3rd, 2015
Signs life on planets outside our solar system could be found in exoplanet atmospheres, but possible "false positives" are making scientists cautious.
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Should Scientists Be Looking for the Last Life-Forms on Mars?
Gale Crater Erosion
July 30th, 2015
Life may have thrived in the oceans and lakes that once covered Mars — but some organisms may have survived long after the water dried up. Could scientists still find evidence of these last life-forms on Mars?
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