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 episode of BrainStuff.Learn more about advertising on the HowStuffWorks podcasts at www.howstuffworks.com/advertisers.htmAnd to learn about your ad choices when listening to podcasts, visit https://www.howstuffworks.com/privacy.htm#ad-choices
