We know rhubarb as a tart fruit that looks like pink celery, but it also has a bulbous underground storage unit that was used medicinally for millennia -- and lets it grow in complete darkness. Learn about the pie plant (and how rhizomes work) in this episode of BrainStuff, based on this article: https://home.howstuffworks.com/rhubarb.htm

How Do Manatees Work?
09:36

Why Do We Put Diamonds on Engagement Rings?
11:55

How Did the Stonewall Riots Work?
16:58