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    One of the reasons NASA sends so many missions to Mars is because of the planet´s potential for life. Current missions search for factors thought to be necessary for life, such as liquid water and organic molecules, but some scientists now say the search
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    Embryonic stem cells behave differently outside the pull of Earth's gravity, researchers suggest. These findings indicate why the human body deteriorates during long space missions, and warn that procreation in space may be fraught with peril.
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    Before they can be sent out to explore planets or moons, rovers first need to be tested in the field. While there is no perfect analog for Jupiter´s icy moon Europa, there are various spots on Earth and elsewhere that are similar enough to conduct
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    A bias in the way amino acids twist could be due to supernovae, researchers now suggest. If correct, this could be more evidence that the molecules of life came from elsewhere in the cosmos.
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    By calculating where photosynthesis might be possible around the galaxy, scientists are developing a new way to figure out where Earth-like planets with life might be located.
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    Jupiter's moon Europa has a salty ocean where life could exist. A thick ice shell separates the ocean from our exploration vehicles, and it´s not known how far down we´d need to drill. But why drill at all, when evidence for life could
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    Jupiter´s moon Io is the most volcanically active body in the solar system. Could it also be a habitat for life?
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    Jupiter´s moon Europa has a salty ocean, and scientists have long wondered if life could be found there. One scientist says Europa also has enough oxygen to support an ocean teeming with life.
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    A new study finds that microbes on spacecraft might be able to survive on Mars longer than previously thought. The key to their survival? Dust.
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    Single-celled organisms found in lakes of liquid asphalt may indicate the type of extreme life that could exist on Saturn´s moon, Titan.
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  • Seeing the Closest Aliens Will Take Centuries
    As telescopes become more advanced, we´ll be able to see more details about planets orbiting other stars – including indications that those planets have life. However, it would probably take many centuries before we could actually see the aliens.
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    Cracks in the icy shell of Jupiter´s moon Europa contain sulfur-rich material. An expedition to a sulfur spring in the Arctic could help solve some mysteries about Europa – including its potential for life.
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