This Astronaut's Spacewalk Selfie Literally Tops All Others

Some selfies are better than others. This one, snapped by an astronaut in orbit hundreds of miles above the Earth's surface, tops them all--literally. And given that the ambient temperature during an orbit ranges from 250 degrees and minus 250 degrees Fahrenheit, it's likely the hottest selfie, too--or the coldest. The space selfie was taken by NASA astronaut Steve Swanson on Wednesday during a spacewalk outside the International Space Station (ISS). Fellow astronaut Rick Mastracchio then shared...