Scientists say there really was life on Mars

Rocks near dried out lakes may show life really did emerge on Mars, according to Scottish scientists.

The iron rich sediments are the likeliest place to find fossilised microbes dating back three to four billion years. The new study by the University of Edinburgh sheds light on locations Nasa’s next rover Mars 2020 should concentrate on.

The next-generation robot will carry a sophisticated mobile geology lab designed to search for signs of tiny dead Martians. Primitive algae and bacteria are the most likely ancient inhabitants of the Red Planet that was once covered in water.

Study leader Dr Sean Mcmahon, of the School of Physics and Astronomy, and colleagues found rocks made of compacted mud or clay are the best bet because they are rich in iron and a mineral called silica, which helps preserve fossils. Dr Mcmahon said: “There are many interesting rock and mineral outcrops on Mars where we wouldliketosearchforfossils. But since we can’t send rovers to all of them we have tried to prioritise the most promising deposits.” The researchers say the rocks are better preserved than those of the same age on Earth.