Scientists just found a clue about photosynthesis from 1.75 billion years ago, bringing us closer to understanding how life on Earth started, according to Prevention. In a recent study, published in the journal Nature, a group of researchers found tiny fossils in the Australian desert that show the earliest signs of photosynthesis. These fossils are from cyanobacteria, a type of organism that has been around for a long time, about 3.5 billion years. Some of these cyanobacteria developed structures called thylakoids within their cells, where photosynthesis happens. This process may have release…