This mission also created another amazing opportunity for NASA. Normally, the space agency would have to rely only upon the data gathered by studying the returning astronauts. But with Scott Kelly, that's not quite the case. That's because Kelly is a twin — his brother, Mark, remained on Earth while Scott soared above. Oh, and Mark is also a former astronaut. You have to imagine their family reunions get a little competitive. … [Read more...] about Welcome Home Astronaut Kelly and Cosmonaut Kornienko!