Science
Microbes may have lived in the underground for more than a billion years – Phys.org
A study using the thermal history and biosignatures of the upper few kilometers of some of the oldest rocks on Earth place constraints…

A study using the thermal history and biosignatures of the upper few kilometers of some of the oldest rocks on Earth place constraints on the evolutionary history of microbes in the deep biosphere. A new study, published in PNAS, Proceedings of the National…
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