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Bad news for alien life? Earth-size planets may be less common than we thoughtUp to 200 worlds investigated by NASA's exoplanet-hunting TESS satellite could be bigger than predicted, a finding that could impact our search for alien life.
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If aliens existed on Mars 3.7 billion years ago, they would have needed umbrellasA vast network of inverted channels, formed of sediment laid by ancient rivers, implies Mars was once a much rainier place than we thought.
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Largest known Martian meteorite on Earth sells for $5.3 million at auctionThe largest known Martian meteorite, NWA 16788, has been sold at auction for $5.3 million. The hefty chunk of the Red Planet, which weighs 54 pounds, could help unravel new secrets about Mars — if it's allowed to be studied.
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Could signs of Mars life be hidden in its thick layers of clay?The thick, mineral-rich layers of clay found on Mars suggest that the Red Planet harbored potentially life-hosting environments for long stretches in the ancient past, a new study suggests.
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Mystery of Mars' missing water could be solved by the planet's tipsy tiltMars has lost immense amounts of water over it lifetime, and scientists aren't sure exactly how. New research hints that the planet's violently varying tilt may be a key factor.
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Mercury's 'missing' meteorites may have finally been found on EarthMeteorites may be the only practical way to study Mercury's surface directly.
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'A completely new phenomenon': Astronomers spot a planet causing its star to constantly explodeAstronomers have spotted an alien planet orbiting so closely to its home star, the planet's magnetic field is triggering massive solar flares to erupt. This is the first time a planet has been seen influencing its host star.
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Astronomers discover origins of mysterious double hot Jupiter exoplanets: 'It is a dance of sorts'Astronomers have discovered the strange dance that leads to the creation of rare "double hot Jupiters" in binary star systems that are "just right."
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Does Mars have a moon?Mars is smaller than Earth, but does it have any moons?
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