Host Mo Rocca shows us the fishing cannon that fires your hook and bait hundreds of feet into the water; fighting droughts with rainwater cisterns; self-healing glass; and, how tractors changed the farming world.

Host Mo Rocca shows us the fog security system that deters burglars; the jet hoverboard that flies over 100 mph as high as 9,000 feet; the new discovery to grow crops in deserts; and, the history of ham radios keeping the world connected.