Bacteria 830 million years old have been found in salt crystals.

They may still be alive. Rock salt lay at a depth of 1.2 kilometers. It probably formed during the sedimentation of saline surface waters. During growth, liquid with particles of the environment could capture the crystals - this is how microorganisms appeared in them. Scientists suggest that among them there are bacteria, unicellular algae, spores of bacteria or fungi. Geologists believe that if life ever existed on Mars, it could also survive to this day in the sediments of former salt lakes.