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The discovery, published in Science, was made with radar waves from the Mars Express spacecraft, circulating in March around March since December 2003.
– Radar waves gave exactly the same signature as on Antarctic Earth . In other words, it's a reasonable interpretation that it's a lake that has been discovered, says Anders Eriksson, a researcher at the Uppsala Institute of Space Physics.
The lake, extending over 20 kilometers in diameter 1.5 kilometers below the bridge. According to Anders Eriksson, it is precisely on such a site that researchers were waiting to find liquid water on Mars.
Up to now, it was not known if liquid water was present on the planet. Temperatures are very low, averaging around 55 degrees, but even lower around the poles.
The researchers at the origin of the discovery hypothesize that the lake water is probably undercooled –
been there and measured the temperature. But it is very likely that this is the case, "explains Anders Eriksson
He points out that the discovery largely affects the issue of existence on Mars.
– Au least, it does not reduce the probability.
Different types of robotics moving on the ground on Mars have been sent repeatedly, including to investigate the presence of substances that could indicate the existence of microscopic forms But Anders Eriksson thinks it's more than necessary to get definitive answers.
– It's hard with robots. To find out if there's any life, it's as if you were to send an old man or a rubber capable of thinking of himself. "An excellent place for such an expedition would be well on the edge of the South Polar, he says. [19659011]
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