Study suggests ancient skies rained down ingredients for life on Earth

Study suggests ancient skies rained down ingredients for life on Earth

Earth’s earliest atmosphere may have done more than shield the planet from the Sun. New research suggests the sky itself helped supply early life with key sulfur-based molecules, long thought to appear only after biology took hold. A study published in the Proceedings of the National Academy of Sciences reports that Earth’s ancient air likely produced important sulfur compounds before life existed. Scientists at the University of Colorado Boulde…