The ability to use atmospheric nitrogen to support more widespread life was thought to have appeared 2 billion years ago. Now, a study led by Dr Eva Stüeken from the University of Washington has found evidence that 3.2 billion years ago, life was already pulling nitrogen out of the air and converting it into a form that could support large and diverse biosphere. Early Earth. Image credit: Christine Daniloff. Dr Stüeken and her colleagues from the...
