Do you knock on wood or avoid particular numbers? People around the world adhere to superstitions to attempt to change their luck -- and some of those superstitions are remarkably similar. Learn more in this classic episode of BrainStuff, based on this article: https://people.howstuffworks.com/superstitions-universal-across-cultures.htm

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

How Did the Stonewall Riots Work?
16:58

How Did the Smallest Primates Get Such Big Eyes?
08:27