We Owe Our Lives to 3-Billion-Year-Old Stromatolite Fossils https://flip.it/ZZD_ic #Stromatolite #Fossils #LifeOnEarth

Watching #FrozenPlanet2 last night, saw the segment about #stromatolite life in #Antarctic lake. Amazing! https://www.youtube.com/watch?v=QzEVeFBXfNg

Science mastodon please weigh-in: I recently saw a claim that only oxygenic photosynthesis produces gas as a by-product, BUT I thought that anoxygenic photosynthesis based on retinal vs chlorophyll produced CH4 - so is the 1st claim wrong or the 2nd? #GOE #stromatolite