Related Program: Talk of the Nation on WKNO HD-2 Building Synthetic Tissues from Water Droplets? By editor • Apr 5, 2013 Related Program: Talk of the Nation on WKNO HD-2 TweetShareGoogle+Email Listen Listening... / Originally published on April 20, 2016 12:37 pm Copyright 2016 NPR. To see more, visit http://www.npr.org/. TweetShareGoogle+EmailView the discussion thread.