Mars is increasingly in the viewfinder of planetary scientists, as NASA has made it a goal to send a manned mission to the red planet, sending rovers to its surface and developing technology to prepare for human exploration. The increased focus on Mars has led to some intriguing discoveries—most recently, that life might have existed on the planet before climate change ended it. That's the suggestion of a new study; read on to find out more.
These kinds of microbes live by converting chemical energy from their environment and releasing methane as waste. Some of the same kinds of microbes exist in extreme habitats on Earth, such as hydrothermal vents along fissures in the ocean floor.
"According to our results, Mars' atmosphere would have been completely changed by biological activity very rapidly, within a few tens or hundreds of thousands of years," said the study's first author, Boris Sauterey of the Sorbonne."By removing hydrogen from the atmosphere, microbes would have dramatically cooled down the planet's climate."Advertisement
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