Photosynthesis Began a Billion Years Earlier Than Thought
December 17, 2003
According to the BBC News, some scientists have pushed back the evolution of photosynthesis a billion years earlier than previously believed, to 3.9 billion years ago. This is based on uranium-thorium ratios of rocks in Greenland that led Danish researchers to conclude that they were deposited under oxidizing conditions. Others are not sure the data […]
