Author: Cédric M. John, Professor and Head of Data Science for the Environment and Sustainability, Queen Mary University of London

Were Earth's oceans once green? 100Y Design/Shutterstock Nearly three fourths of Earth is covered by oceans, making the planet look like a pale blue dot from space. But Japanese researchers have made a compelling case that Earth’s oceans were once green, in a study published in Nature. The reason Earth’s oceans may have looked different […]