Darwinism Intelligent Design Plants stasis Stirring the pot (tentative thoughts/explorations)

Researchers: Photosynthesis may be a billion years older than thought … But WAIT!

“Dr Cardona also suggests that this might mean oxygenic photosynthesis was not the product of a billion years of evolution from anoxygenic photosynthesis, but could have been a trait that evolved much sooner, if not first.” So when did the billions of years of Darwinian evolution that “gradually evolved” photosynthesis happen?