Host Mo Rocca shows us how science is transforming spinach leaves into new heart tissue; deterring burglars with a fog security system; turning cement pipes into compact housing; and, when U.S. automakers became wartime plane makers.

Host Mo Rocca shows us saving homes from floods with an inner tube-like system; the baker using math to create her artistic pies; the French app maker keeping travelers safe by warning of high crime areas to avoid; and, the history of ham radios keeping the world connected.