Scientists have made a groundbreaking discovery about the origins of photosynthesis. Fossils of ancient bacteria have provided the oldest evidence of the machinery required for photosynthesis, according to a recent study. The fossils, dating back billions of years, contain structures called thylakoids, which are essential for capturing and converting sunlight into energy. The findings shed new light on the evolution of life on Earth, suggesting that photosynthesis may have emerged much earlier than previously thought. Understanding the early development of photosynthesis can provide valuable insights into the history of life and the potential for extraterrestrial life.