Lemmings have a reputation for being suicide-obsessed cliff-diving rodents, but what explains this curious behavior?

While Brent and Ryan work on season two of the Notcast, we explore the "Or Not" side of Ripley's Believe It or Not!. This week, we look into the mystery of lemming behavior, and how our understanding of these rodents became so warped.

Show notes are on Ripleys.com. You can join the Notcast conversation on Twitter or drop us a line at [email protected].