Life-Swapping Scenarios for Earth and Mars
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Evidence is mounting that    the time-weathered red planet was once a warm and water-rich world. And a Mars    awash with water gives rise to that globe possibly being fit for habitation    in its past - and perhaps a distant dwelling for life today.
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DENVER, Colo. -- The next spacecraft destined for&nbsp;Mars is rapidly coming together&nbsp;here on Earth -- an interplanetary probe that carries the most powerful instruments ever sent to the red planet.
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The whale's tiny ancestor, how global warming may be hurting plants' carbon-fixing ability, and the mystery of Mars's missing limestone
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Scientists discuss their preferred targets for the next "flagship" mission to another world.
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There is new hope that Earth, if not the life on it, might survive an apocalypse five billion years from now.
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Concentrations of water vapor and methane gas in certain regions of the red planet strengthen speculation that Mars could be a haven for microbial life.
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The best way to make Mars habitable would be to inject synthetic greenhouse    gases into its atmosphere, researchers said Thursday.
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DENVER, COLORADO -- Those twin robots hard at work on Mars have transmitted teasing views that reinforce the prospect that microbial life may exist on the red planet.
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By Matt Nauman, San Jose Mercury News, Calif.  Dec. 10--Elon Musk wants to send humans to space. Here on Earth, though, he wants us to be able to drive very fast electric cars.   You might as well have fun before you leave the planet.
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Imagine our sun snatching an alien planet from another solar system, four billion years ago. A team of scientists, including a Utah physicist, say it&#39;s a possibility based on a wild new simulation.
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Scientists say there is no doubt that abundant water once soaked Mars. Now the big question is whether the red planet ever supported life. Some experts say the early signs are promising.
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Earth sits between two worlds that have been devastated by climate catastrophes.
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By James Fuller Daily Herald Staff Writer  Life is good in the year 2537, especially if you happen to live deep underwater on Europa, one of Jupiter's moons.  That's an ideal jumping off location for deep space exploration.
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The European Space Agency(ESA) says it has found concentrations of water vapour and the gas methane in the same places on Mars, which strengthen speculation that the Red Planet could be a haven for microbial life.
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ROBERT ZUBRIN: First for the science, second for the challenge, and third for the future. First, for science. Mars is the key to letting us know if life is a general phenomenon in the universe.
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For the past 30 years scientists have scoured the most inhospitable environments or life. Just about everywhere they look, they find it thriving in microscopic form.
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Almost by accident, NASA's Mars rover Opportunity has found a rock that may point to a second water event in the red planet's past.