Our world had oxygen 700 million years earlier than we thought

About 2.3 billion years ago, Earth underwent what is known as the Great Oxidation Event, as early lifeforms photosynthesized enough oxygen that the gas took hold as a dominant part of our atmosphere. This massive shift allowed for the evolution of pretty much all complex life... but its roots go back far earlier than… » 9/29/13 4:00pm 9/29/13 4:00pm

New sci-fi TV series feature teen aliens, android cops and Alfonso…

Big sci-fi TV news: Alfonso Cuarón's Believe, J.J. Abrams' new Fringe-esque cop drama and two other new sexy science fiction series have been given the greenlight. From high concept to teen drama, there are four new TV series steeped in sci-fi that could be airing in your homes next year. Here's a run down on what we… » 1/28/13 9:10am 1/28/13 9:10am

600 million-year-old fossils reveal catastrophic oxygen loss on ancient…

635 million years ago, almost the entire planet was a frozen ball of ice. And yet mere tens of millions of years later a population explosion happened deep underwater in South China, preceding the better-known Cambrian explosion by a significant time period. In these oxygen-free waters, more than 3,000 fossils of 15… » 2/17/11 9:00am 2/17/11 9:00am