EarthSuper-Earths draw asteroids to other worlds, which may seed life Asteroid collisions can be destructive – just ask the dinosaurs – but they also bring key ingredients for life. Super-Earths can draw them to nearby worlds News
SpaceCassini's Grand Finale: The ups and downs of our 20-year mission Michele Dougherty's team rode its luck to make eye-opening discoveries around Saturn and its moons. She reveals the project's pleasures and pains Features