When Did Photosynthesis Begin?
Photosynthesis first started around 3 billion years ago, give or take a few hundred million years—what's a couple of eons among friends? That's when cyanobacteria, or 'blue-green algae,' began producing oxygen and completely changed Earth's atmosphere. Talk about a long-lasting impact!
Win gift cards by playing fun games on Playbite!
Playbite
(13.7k)
500k winners and counting...
More Answers
Photosynthesis began about 2.4 to 2.7 billion years ago. Thanks, cyanobacteria, for the oxygen party!
No one knows the exact date photosynthesis started, but it was longer ago than your last haircut, that's for sure.
The brands referenced on this page are not sponsors of the rewards or otherwise affiliated with this company. The logos and other identifying marks attached are trademarks of and owned by each represented company and/or its affiliates. Please visit each company's website for additional terms and conditions.
People also want to know
Add an Answer