Worm grows two heads after space mission

In an extremely rare occurrence, the body plan of a planarian flatworm changed after five weeks aboard the International Space Station. Subscribe to CNET: http://cnet.co/2heRhep Check out our playlists: http://cnet.co/2g8kcf4 Like us on Facebook: http://ift.tt/1930vfU Follow us on Twitter: https://www.twitter.com/cnet Follow us on Instagram: http://bit.ly/2icCYYm Add us on Snapchat: http://cnet.co/2h4uoK3
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