To understand the the long-term effects of space on the human body, NASA is conducting an experiment involving twins! Join Tara as she explains what they hope to learn by sending one twin to space, but not the other. Read More: NASA To Conduct Unprecedented Twin Experiment http://phys.org/news/2014-04-nasa-unprecedented-twin.html "Consider a pair of brothers, identical twins. One gets a job as an astronaut and rockets into space. The other gets a job as an astronaut, too, but on this occasion he decides to stay home. After a year in space, the traveling twin returns home and they reunite." Watch More: Can A Stranger Look Like Me? https://www.youtube.com/watch?v=chp7pYZcQCE TestTube Wild Card http://testtube.com/dnews/dnews-437-pets-make-us-healthier?utm_campaign=DNWC&utm_medium=DNews&utm_source=YT Is Time Travel Possible? https://www.youtube.com/watch?v=I5bvjL6h6nY ____________________ DNews is dedicated to satisfying your curiosity and to bringing you mind-bending stories & perspectives you won't find anywhere else! New videos twice daily. Watch More DNews on TestTube http://testtube.com/dnews Subscribe now! http://www.youtube.com/subscription_center?add_user=dnewschannel DNews on Twitter http://twitter.com/dnews Trace Dominguez on Twitter https://twitter.com/tracedominguez Tara Long on Twitter https://twitter.com/TaraLongest Laci Green on Twitter http://twitter.com/gogreen18 DNews on Facebook https://facebook.com/DiscoveryNews DNews on Google+ http://gplus.to/dnews Discovery News http://discoverynews.com Download the TestTube App: http://testu.be/1ndmmMq