"Tests aboard a research vessel in the Arctic ocean found that certain crystals can be used to reveal the position of the sun, a trick that would have allowed early explorers to ascertain their p

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"...even as new missions to Mars seek evidence that the planet might once have supported life, we already have data showing that life exists there now--data from experiments done by the Viking Ma

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"...if the Viking scientists had known these results thirty years ago, they would have interpreted Viking’s work differently [...] we can’t discount organic molecules in the soil, which probably

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"Researchers now say that the landers’ experiments were not sensitive enough to find life and in any case may not have been able to spot the strange forms that Martian life might take."

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