That movement has now left one pool of molten material on the west of the caldera disconnected from any heat sources, which will likely allow it to cool. Meanwhile, the largest pool of near-surface molten rock is east of the caldera, which may ultimately drive a transition of explosive eruptions outside the present caldera.

Now that "Yellowstone" has aired its final episode, the next show in Taylor Sheridan's universe will star Michelle Pfeiffer in "The Madison." Here's everything we know.