Tagged With mars

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If we ever get proof of past life on Mars, it will come in the form of biosignatures, fingerprints that could only have been left by living organisms. We're a long way from finding that smoking gun evidence, but an analysis of silica minerals discovered by NASA's Spirit rover pushes us one step closer. Because of their similarity to silica deposits shaped by microbial life on Earth, these intriguing Martian minerals are now being called a "potential biosignature".

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National Geographic's new TV miniseries Mars has a message for the people of Earth: Colonising the Red Planet is not a pipe dream. In fact, it's achievable within a generation. Unfortunately, in the first few episodes at least, that message smothers the show's ability to tell a good story. Mars is much more enjoyable when it's not trying to cram facts, figures and carefully scripted interviews down our throats.

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Placed on Earth, it would stretch from Washington DC to New York to Denver. Larger than the Grand Canyon, wider and deeper than East Africa's Great Rift Valley, Mercury's newly-discovered "Great Valley" boggles the imagination. But it's more than size that makes this geologic feature remarkable. The Great Valley may be our best evidence that Mercury's entire crust is contracting.

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This weekend, National Geographic's Mars: The Live Experience is touring Sydney, Melbourne and Canberra, with astronaut Buzz Aldrin and scientists from NASA and the European Space Agency talking about the future of space and humanity's goal of reaching Mars — what many believe should be our goal as a civilisation and the potential for the continued survival of the human race.

Before the shows, we sat down with Professor Mark McCaughrean, a senior science advisor at the ESA, to get his take on what the Agency does, what it sees as the future of missions to space, and how it works with governments and private sector space companies like SpaceX.

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Video: This planet of ours, it ain't gonna last forever. And though who the heck knows what's going to happen to the world that far off into the future (or even after November 8), Life Noggin decided to conduct a little brain exercise about how we could convert a planet like Mars or Venus, or a moon like Europa, into a second Earth.