1. Terrestrial microbes could survive briefly on Mars, be a food source for astronauts: Study  Firstpost
  2. Microbes from Earth could temporarily survive on Mars: study  The Hindu
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The endurance of some microbes to conditions on Mars were tested by launching them into Earth's stratosphere, which closely represents that on Mars.The endurance of some microbes to conditions on Mars were tested by launching them into Earth's stratosphere, which closely represents that on Mars.

Terrestrial microbes could survive briefly on Mars, be a food source for astronauts: Study- Technology News, Firstpost

While not all the microbes survived the trip, one previously detected on the International Space Station, the black mold Aspergillus niger, could be revived after it returned home.While not all the microbes survived the trip, one previously detected on the International Space Station, the black mold Aspergillus niger, could be revived after it returned home.

Microbes from Earth could temporarily survive on Mars: study - The Hindu