World’s oldest algae fossils date back 1 billion years, says
new research, Intelligencer, December 24, 2017
https://www.mcgill.ca/channels/channels/news/origins-photosynthesis-plants-dated-125-billion-years-ago-283492
https://www.lintelligencer.com/worlds-oldest-algae-fossils-date-back-1-billion-years-says-new-research-419-2017/
First photosynthesis took place 1.25 billion years ago: Study
Economic times, Dec 24, 2017
https://economictimes.indiatimes.com/news/science/first-photosynthesis-took-place-1-25-billion-years-ago-study/articleshow/62231708.cms