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American Focus > Blog > Tech and Science > Oldest living microbes found in 2-billion-year-old rock
Tech and Science

Oldest living microbes found in 2-billion-year-old rock

Last updated: October 5, 2024 3:22 am
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Oldest living microbes found in 2-billion-year-old rock
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Ancient Microbes Discovered in Sealed Rock Fracture

In a groundbreaking discovery, researchers have found microbial life that has been thriving in a sealed rock fracture nearly 50 feet below the Earth’s surface for the past 2 billion years. This finding, which surpasses previous records by as much as 1.9 billion years, sheds light on the earliest stages of evolutionary life on Earth and has implications for our understanding of life on Mars.

Oldest Known Lifeforms Uncovered

Published in the journal Microbial Ecology, the study conducted by the University of Tokyo’s Department of Earth and Planetary Sciences builds upon their previous discovery of the oldest known lifeforms in 2020.

Exciting Discovery of Ancient Microbes

Lead author Yohey Suzuki expressed his excitement about the discovery, stating, “We didn’t know if 2-billion-year-old rocks were habitable… so this is a very exciting discovery.” The researchers utilized advanced imaging techniques to confirm the age and origin of the microbes, ensuring that they were indeed native to the rock sample.

Microbe rock sample
This picture was taken on site when the drill core sample was washed, flamed and then cracked. Credit: Y. Suzuki

The Secret of Microbial Survival

The unique conditions of the Bushveld Igneous Complex in South Africa provided a stable environment for the ancient microbes to thrive. The volcanic formations, which date back billions of years, contain tiny fissures where microbial life found a home. The surrounding clay sediment sealed the cracks, creating a protected habitat that allowed the microbes to survive with minimal evolutionary changes.

Implications for Mars Exploration

The discovery of ancient life in sealed rock fractures not only enhances our understanding of Earth’s early evolutionary processes but also holds promise for future Mars exploration. With NASA’s Mars rover Perseverance set to return rocks of a similar age, researchers are hopeful that these samples could provide insights into the potential for microbial life on the Red Planet.

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The study opens up new avenues for exploring the origins of life on Earth and beyond, offering a glimpse into the distant past and the possibility of uncovering ancient microbial life on other celestial bodies.

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