Host Mo Rocca shows us the innovation of re-breathing air under water; the engineering wizardry in massage chairs; the spider catcher saving the 8-legged crawlers; and circling around the history of carousels.

Host Mo Rocca shows us how drones are searching for sharks to keep beaches safe; the medicine-free pain relieving device; how collecting water in Africa is less of a pain in the neck; and the battles over famous patents.