Some early life forms may have breathed oxygen well before it filled the atmosphere
February 06, 2026
February 06, 2026
CAMBRIDGE, Massachusetts, Feb. 6 -- The Massachusetts Institute of Technology posted the following news:
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Some early life forms may have breathed oxygen well before it filled the atmosphere
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Oxygen is a vital and constant presence on Earth today. But that hasn't always been the case. It wasn't until around 2.3 billion years ago that oxygen became a permanent fixture in the atmosphere, during a pivotal period known as the Great O . . .
* * *
Some early life forms may have breathed oxygen well before it filled the atmosphere
*
Oxygen is a vital and constant presence on Earth today. But that hasn't always been the case. It wasn't until around 2.3 billion years ago that oxygen became a permanent fixture in the atmosphere, during a pivotal period known as the Great O . . .