Hidden biosphere discovered beneath Atacama Desert, world’s driest desert!

As per the latest development, a new research has unveiled a rich microbial ‘biosphere’ thriving 13 ft beneath the desolate expanse of Chile's Atacama Desert. This remarkable discovery sheds light on an enigmatic world of bacteria, nestled within the arid soils of the Yungay Valley.

While microbial life had been previously documented down to depths of 2.6 ft in the Atacama Desert, this newfound biosphere presents a remarkable revelation. Secluded from the surface, this hidden community occupies soils ranging from 6.6 ft (2 m) to at least 13 ft deep, showcasing a remarkable resilience to the harsh conditions of their environment.
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Dominating this subterranean realm are Actinobacteria, a diverse group of bacteria known for thriving in extreme environments, such as the Arctic and boiling hot springs. The presence of these microorganisms in the Atacama Desert's depths indicates the potential for life in seemingly inhospitable environments and offers valuable insights into the search for extraterrestrial life, particularly on Mars.

The researchers also discovered Actinobacteria residing closer to the surface, between depths of 0.8 to 2 in, while deeper excavations revealed the presence of Firmicutes bacteria. These findings highlight the adaptability of microbial life forms to extreme conditions, including high salt concentrations and anaerobic environments.
The Atacama Desert, renowned as the driest hot desert on Earth, poses formidable challenges to life, with only a handful of animals managing to survive its harsh conditions. Yet, within its salty, mineral-rich soils, certain bacteria have found a foothold, thriving despite the arid climate.

In their quest to understand the desert's biota, the researchers delved more than 4 m deep into the Yungay Valley's playa, employing innovative extraction methods to study living organisms' DNA. Their findings reveal a previously unknown deep biosphere beneath hyper-arid desert soils, potentially extending downwards for an indefinite distance.

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This deep bacterial community's reliance on gypsum for water holds intriguing implications, especially considering Mars' similar geological features. The presence of gypsum deposits on Mars raises great possibilities for microbial life, which further points out to the significance of this discovery in the ongoing exploration of the Red Planet's potential habitability.