1.6-bn-yr-old fossils made by oxygen bubbles found in India
A team of Danish and Swedish researchers have studied 1.6-billion-year-old fossils formed by microbes which created oxygen bubbles as small as the width of a human hair. The cyanobacteria, mined from Vindhya and Aravalli in central India, are believed to be crucial in allowing other life on Earth to flourish by excreting oxygen and minerals after photosynthesis. 