Researcher Mario Corsalini stands by giant gypsum rosette crystals in the Naica mine in Chihuahua, Mexico Credit: Penelope J Boston/PA
Lifeforms which have been living inside crystals for up to 60,000 years have been revived by NASA, raising hopes that alien organisms could be found in extreme environments on other planets.
Penelope Boston, the director of NASA’s Astrobiology Institute, and her team have spent years exploring Mexico’s Naica Mine in Chihuahua looking for extremophiles, which contain caves as large as cathedrals.
Dr Boston looking at selenite crystals from the Naica mine in Chihuahua. An extraordinary population of microbes has been discovered trapped in crystal in a volcanically heated Mexican cave system Credit: Penelope J Boston/PA
The mine is filled with giant gypsum crystals which look so extraordinary that when Dr Boston first saw a picture, she assumed it had was a Photoshop hoax.
“Much to my surprise we got things to grow,” said Dr Boston. “It was laborious. We lost some of them – that’s just the game. They’ve got needs we can’t fulfill. That part of it was really like zoo keeping.”
A researcher examines one of the giant crystals Credit: Penelope J Boston/PA
Around 100 different bugs, which were mostly bacteria, were found inside crystals, where they had been trapped for between 10,000 and 60,000 years. 90 per cent had never been seen before.
The cave system sits above a large pocket of volcanic magma and is geothermally-heated to temperatures of up to 60C, which has led to astrobiologists dubbing it ‘hell’.
Most life could not survive there but scientists have discovered some organisms have evolved to feed on the sulphides, iron, manganese or copper oxide in the cave.
Scientists from the New Mexico Institute of Mining and Technology made the 60,000 year-old discovery after venturing into caves that had been shut off from light and oxygen Credit: Penelope J Boston/PA
“They’re really showing us what our kind of life can do in terms of manipulating materials,” said Dr Boston.
“These guys are living in an environment where there’s not organic food as we understand it. They’re an example at very high temperatures of organisms making their living essentially by munching down inorganic minerals and compounds. This is maybe the deep history of our life here.”
Describing working in the cave she said: ”It was a transformative experience…it really felt strange. It was a very hard environment to work in, but tear-inducingly beautiful. It’s like being inside a geode.”
Dr Boston, the director of NASA’s Astrobiology Institute, led the expedition deep into the mines Credit: Penelope J Boston/PA
Some of the “sparkling white” giant crystals are as long as five metres.
“I can’t even put my arms round the biggest ones,” she added.
Other caves detected with “weird life forms” but accessing them was too dangerous.
Other “weird life forms” are thought to exist in as-yet inaccessible caves Credit: Penelope J Boston/PA
NASA has plans to bring back rock and ice samples from Europa, an icy moon of Jupiter, which is one of the best targets in the solar system for life because it has a salty ocean beneath its crust.
Dr John Rummel, from the Seti Institute in Mountain View, California, said it was “pretty easy” for bugs to survive space journeys as long as they are shielded from the sun’s ultraviolet radiation.
“If we bring samples back from either Europa or Mars, we will contain them until hazard testing demonstrates that there is no danger and no life, or continue the containment indefinitely while we study the material.
“It is assumed that such life would be hardy – to survive the trip to Earth; not easy – and precautions taken would provide a very high degree of containment.
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