EarthAsteroid that killed the dinosaurs caused massive global warming The asteroid that struck Earth 66 million years ago caused dramatic climate change, which could mean we are underestimating how much the planet will warm in the coming centuries 51¶¯Âþ
HumansStem cells may reveal how Neanderthal DNA works in modern humans Many of us carry DNA inherited from Neanderthals, but we can’t be sure how it affects us. Stem cells with Neanderthal DNA could tell us 51¶¯Âþ