An article published in the journal “Trends in Plant Science” reports a deveolpment of a theory on the evolution of photosynthesis. Tanai Cardona and A. William Rutherford of Imperial College London studied various bacteria belonging to species capable of photosynthesis. Their conclusion is that the photosynthesis we know today thanks to plants was possible much earlier than previously thought and wasn’t an evolution of another form that is generally considered more primitive and doesn’t lead to the release of oxygen.