Ancient microbes on Mars blamed for climate change
Researchers suggest organisms may show that ‘common fate of life in the universe is to self-destruct’
Ancient Mars may have had an environment capable of harbouring an underground world swarming with microscopic organisms, French scientists have concluded.
But according to the climate modelling study, published in the journal Nature Astronomy, these simple life forms would have altered the atmosphere so immensely that they activated a Martian Ice Age and brought about their own demise. The theory is that the “early microbes started devouring the hydrogen and producing methane (which on Earth acts like a potent greenhouse gas)”, said Space.com, and that this “slowed down” the warming greenhouse effect, “making ancient Mars gradually so cold it became inhospitable”.
The study’s lead author, astrobiologist Boris Sauterey, said the findings – based on computer simulations of the ancient Martian crust and hydrogen-consuming microbes like those on ancient Earth – suggest that even simple life “might actually commonly cause its own demise”.
Subscribe to The Week
Escape your echo chamber. Get the facts behind the news, plus analysis from multiple perspectives.
Sign up for The Week's Free Newsletters
From our morning news briefing to a weekly Good News Newsletter, get the best of The Week delivered directly to your inbox.
From our morning news briefing to a weekly Good News Newsletter, get the best of The Week delivered directly to your inbox.
Associated Press described this verdict as a “bleak view of the ways of the cosmos”. But Sauterey argued that while “a bit gloomy”, the findings were are “also very stimulating” because they “challenge us to rethink the way a biosphere and its planet interact”.
For instance, he “believes the new work will be useful for future Mars missions”, reported Inverse, “as it could help identify ideal pockets of the surface where Mars’ primitive biosphere might have survived a possible ice age”.
Sauterey also “points to the team’s model as a tool to help understand if planets in our solar system and others might harbour life”, the science news site added. “Rather than early life being easily self-sustaining, biospheres could enter into feedback loops that lead to their own deterioration.”
However, the wider conclusions remain less rosy. The study “kind of points to the fact that potentially one of the limiting factors of the commonality of life in the universe is life itself”, said Sauterey.
“Hopefully, on Earth, that tendency did not exist and was compensated by other things,” he said, “but potentially it is a common fate of life in the universe to self-destruct.”
Create an account with the same email registered to your subscription to unlock access.
Sign up for Today's Best Articles in your inbox
A free daily email with the biggest news stories of the day – and the best features from TheWeek.com
-
Who actually needs life insurance?
The Explainer If you have kids or are worried about passing on debt, the added security may be worth it
By Becca Stanek, The Week US Published
-
Sexual wellness trends to know, from products and therapies to retreats and hotels
The Week Recommends Talking about pleasure and sexual health is becoming less taboo
By Theara Coleman, The Week US Published
-
Is the AI bubble deflating?
Today's Big Question Growing skepticism and high costs prompt reconsideration
By Joel Mathis, The Week US Published
-
14 recent scientific breakthroughs
In Depth From photos of the infant universe to an energy advancement that could save the planet
By Devika Rao, The Week US Published
-
The hunt for Planet Nine
Under The Radar Researchers seeking the elusive Earth-like planet beyond Neptune are narrowing down their search
By Chas Newkey-Burden, The Week UK Published
-
Winchcombe meteorite: space rock may reveal how water came to Earth
The Explainer New analysis of its violent journey confirms scientific theories on the origin of our planet's H2O
By Sorcha Bradley, The Week UK Published
-
Why the Moon is getting a new time zone
The Explainer The creation of 'coordinated lunar time' is part of Nasa's mission to establish a long-term presence on Earth's only natural satellite
By Richard Windsor, The Week UK Published
-
We're in the golden age of space exploration
In depth To infinity and beyond!
By Devika Rao, The Week US Published
-
All the major moon landings so far
The Explainer One giant leap for mankind
By Devika Rao, The Week US Published
-
Jupiter's Europa has less oxygen than hoped
speed read Scientists say this makes it less likely that Jupiter's moon harbors life
By Peter Weber, The Week US Published
-
'Magnolias in space': why scientists have created the world's first wooden satellite
Under The Radar New Japanese probe could help tackle 'graveyard of space junk' encircling Earth
By Chas Newkey-Burden, The Week UK Published