Host Mo Rocca shows us the inventor of an app to monitor your sleep and health; unique trains throughout history; the inventors of a watch-like device that cools your entire body like an air conditioner; and the three Irish girls speeding up how seeds grow.

Host Mo Rocca shows us the inventors of the armband computer mouse; Rosa Parks and the bus that changed the world of race relations; that soon you may be able to print your pancakes; and lighting the world with soda bottles.