Scientists spot ancient 'smiley face' on Mars — and it could contain signs of life

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Scientists spot ancient 'smiley face' on Mars — and it could contain signs of life
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Harry is a U.K.-based staff writer at Live Science. He studied Marine Biology at the University of Exeter (Penryn campus) and after graduating started his own blog site 'Marine Madness,' which he continues to run with other ocean enthusiasts.

Jam packed issues filled with the latest cutting-edge research, technology and theories delivered in an entertaining and visually stunning way, aiming to educate and inspire readers of all agesA recent infrared image from the European Space Agency's ExoMars Trace Gas Orbiter shows a chloride salt deposit on Mars' surface in the shape of a smiley face beaming up at the spacecraft.as they surveyed the alien landscape as part of a new study.

These deposits are particularly important because they"can provide optimal conditions for biological activity and preservation," which makes them"a prime target for astrobiological exploration," researchers wrote in the paper.somewhere between 2 billion and 3 billion years ago The salty deposits were left behind as the last water disappeared from Mars' lakes at the end of the planet's"dynamic aqueous past," researchers wrote. In some locations, the leftover salts are the only evidence that there was any water there at all, they added. But these deposits could also have big implications for the search for evidence of ancient life on Mars.

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