Two natural phenomena go head-to-head in our final match-up of the season. It's ooey, gooey molten lava versus tricky, shifty, fast-acting quicksand. Both are dangerous, both are fascinating, only one can win. Which side are you: Team Lava or Team Quicksand? Tune in to hear both sides and then cast your vote here: https://goo.gl/forms/m5ndQTmN1ZXW7B8r2