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For The First Time, U.S. Scientists Revived A 3.2-Byr-Old Enzyme, Nitrogenase, From Earth’s Pre-Low-Oxygen Era. The Enzyme, Rebuilt In Modern Bacteria, Still Converts Air Nitrogen Into Food For Life As Today’s Versions Do, Confirming Ancient Life Signals In Rocks & Helping To Explain Life’s Origins On Earth & Possible Life On Other Planets.

Resurrected ancient enzyme offers new window into early Earth and the search for life beyond it – UW–Madison News

https://news.wisc.edu/resurrected-ancient-enzyme-offers-new-window-into-early-earth-and-the-search-for-life-beyond-it/

UW researchers are helping us understand the origins of life on Earth and possibly recognize signs of life elsewhere.