Why Pluto Lacks Craters, and Why That's So Freakishly Weird

Pluto has been puzzling us with its weirdly smooth surface, but if it’s the first Kuiper Belt Object we’ve visited, how did we know how many craters to expect in the first place? Here’s everything we’ve figured out about collisions in this chaotic area of our Solar System. » 7/28/15 8:32pm Yesterday 8:32pm

The Plan to Drill into the Crater from the Dinosaur-Killing Meteorite 

Sixty-five million years ago, a meteorite careened into Earth, leaving a huge crater on the coast of the Yucatan Peninsula. The impact is likely responsible for killing off the most of the dinosaurs—along with 75 percent of all species on Earth. Scientists are now planning an expedition to drill into the… » 4/14/15 6:40pm 4/14/15 6:40pm