EarthWhen it comes to climate change, a tantrum is just what we need We can’t wait for the next generation to solve the problem of climate change but today’s kids can still be a big force for change, says Michael E. Mann Comment
EarthThe worst mass extinction may have begun with mass sterilisation There seems to have been a surge in ultraviolet radiation during the Permian extinction 252 million years ago, and it might have left plants infertile rather than kill them News