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 News
EarthJoin NASA's Operation IceBridge on its icy polar mission This photoset is a glimpse into life as an ice watcher – flying long missions over frozen polar terrain to keep tabs on the warming world Regulars