CRATERS from asteroid impacts may be one of the best places to look for life on Mars, a study suggests.
Scientists have found microbes thriving more than a mile under a US crater, where a space rock smashed into the Earth 35 million years ago.
They believe craters may provide a refuge protecting bugs from events such as ice ages or global warming.
Drilling beneath crater sites on Mars could potentially uncover similar life forms, say the scientists.
The scientists' findings are published in the journal 'Astrobiology'.