For a sign that Josh Willis isn't your typical NASA scientist, let's start with the name of his major new climate study: Oceans Melting Greenland. That's "OMG," if your mind isn't the sort to instantly elide everything into texting lingo. Willis, a researcher at NASA's Jet Propulsion Laboratory, likes to inject a little humor into the science of climate change, taking to the stage and to YouTube in the hopes of spurring his audience to action.