“Wildly Fluctuating” Oxygen Levels May Have Accelerated Animal Evolution

Israeli pens plan for belt of solar panels on moon to power oxygen production. With NASA mulling nuclear reactor to generate energy, Ben Gurion University expert says his idea would produce same amount of power with six times less mass.

Climate Warming and Rapid Ice Melt Linked to Volcanic Activity and Low Ocean Oxygen Events During Last Ice Age

Is plant protein as good as animal protein? We asked registered dietitians to help us weigh the benefits of choosing vegan sources over meat.