First animal that doesn't require oxygen to survive

ack

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May 6, 2010
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Earlier this year, scientists discovered that a jellyfish-like parasite doesn't have a mitochondrial genome - the first multicellular organism known to have this absence. That means it doesn't breathe; in fact, it lives its life completely free of oxygen dependency.
This discovery isn't just changing our understanding of how life can work here on Earth - it could also have implications for the search for extraterrestrial life.
Life started to develop the ability to metabolise oxygen - that is, respirate - sometime over 1.45 billion years ago. A larger archaeon engulfed a smaller bacterium, and somehow the bacterium's new home was beneficial to both parties, and the two stayed together.


https://www.sciencealert.com/scientists-find-the-first-animal-that-doesn-t-need-oxygen-to-survive
 

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