Cosmology, Earth Sciences

Signs of oxygen in 3-billion-year-old soil

2 Oct , 2013  

“You’ve heard the story before: if it weren’t for our friends the photosynthetic cyanobacteria, you wouldn’t be able to read this out loud because there would be no oxygen to breathe—and also you would never have existed. Oxygen-producing photosynthesis changed Earth’s atmosphere and paved the way for multicellular life, which would run around eating the […]