On a high plateau in northwestern Argentina, a cluster of turquoise lagoons has quietly rewritten what scientists thought they knew about the earliest stirrings of life. Hidden in one of the driest ...
More than 3.5 billion years ago, the Earth was not the hospitable world we know today. The atmosphere lacked oxygen, the seas ...
Communities found in South Africa called microbialites look like green-tinged rocks, but they grow. Although they resemble some of the oldest evidence for life on Earth, new evidence indicates they ...