Comet, ready for its close-up.

Despite the imperfect landing on the comet by a probe, the European spacecraft is finding surprises about the surface of the comet 67P/Churyumov-Gerasimenko:

"We have smooth surfaces—we don't know how they formed. We have brittle, crumbly material. We have material that looks like rock." There are even rippled features that look like sand dunes. "I don't think anyone had even imagined something like that..."

National Geographic has the story.