The Difficulty Bomb or the Ice Age Extension?

Einstein: With each block, it becomes a little bit harder to make the next block. And so as a result, it's basically you, it's a lottery, you're getting random chances at it. If it's more difficult to get each one, and it's less likely that you get each one,. then it takes a little bit longer each time. But this means they could do this at any time as well. This is an artificial difficulty increase. Even if there are no more miners, difficulty will increase because it's built into the code.