Let's imagine the worst scenario for civilization: humans, for one reason or another, go extinct. What will rise from the ashes of the Anthropocene to take their place? In the second part of this two-part series, Ben, Matt and Dylan explore the possible candidates, from various high-order mammals and avians, to life beneath the seas, to plants, fungi, artificial intelligence and more. (We're extremely excited about this one, and can't wait to hear your picks for the next rulers of Earth.)