To end the year right, Kyle came back to illuminate Nile on the Tunguska Event. For the uninitiated, the Tunguska Event was a massive unexplained explosion in Siberia that puts your favorite explosions to shame. Now, when no blast crater could be found, conspiracy theorists came up with all sorts of fun explanations for this massive blast. Science may think they know what happened, but we get to the truth (hint: aliens) as we unpack the Tunguska Event. We also talk more about butterflies than you could possibly imagine.