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The strongest bacteria resist radiation and life in space

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Deinococcus radiodurans has been included in the Guinness Book of Records as the strongest bacteria in the world, thanks to its incredible ability to withstand the harshest environments and conditions.

Scientists discovered the red globular bacteria that later became known as Deinococcus radiodurans
Some 70 years ago, while examining a can of ground beef that had been damaged despite being sterilized with radiation doses in the Megarad range. Further research showed that this bacterium can withstand 10,000 times the amount of radiation that would kill a human, thanks to its amazing ability to repair many DNA double-strand breaks in a matter of hours.

“Your DNA is severely damaged at 1.7 million rads, your DNA is completely severed. There are 1,000 to 2,000 DNA fragments per cell, but they are all repaired within about 24 hours,” said Michael Daly of the State University of Montana Bozeman, to Science Daily. .

Scientists have found that these bacteria can withstand harsh drought conditions for long periods of time, complete lack of nutrients, extreme temperatures, and even the vacuum of outer space.

In August 2020, studies conducted on the International Space Station found that bacteria
deinococcus radiodurans can live in outer space for at least three years. This discovery is believed by many to support the theory of panspermia, the hypothesis that life exists throughout the universe, distributed in different ways.

Biologists have extensively studied the remarkable ability of Deinococcus radiodurans to survive in harsh environments and then repair itself, hoping to adapt this mechanism to humans to help them better withstand radiation exposure and deal with toxic waste. .

So far, scientists have not been able to determine the bacteria’s natural habitat, as they have been found in various environments, such as elephant dung and granite in the dry valleys of Antarctica, according to Odity Central.


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