Douglas Wheelock, a NASA astronaut, just checked into the International Space Station. On foursquare. In outer space. The feat netted him the NASA Explorer Badge, which I'm sure is the ultimate validation for a real astronaut.
Wheelock, AKA @Astro_Wheels, is the Commander of ISS Expedition 25, a team comprising astronauts and cosmonauts from the U.S. and Russia. His historic check-in earned him the NASA Explorer Badge, which terrestrial foursquar-ers will be able to unlock by visting space-related sites here on Earth. All of this, of course, is very crazy. [Foursquare via @Astro_Wheels]