Do you sometimes wonder–500 million years after the last human perishes in our current mass extinction, how, of those more resilient life forms, some may develop consciousness, learn to do science, and ponder in amazement at the remains that now and then emerge, of what kind of creatures must of made these things, and what happened to bring about about their end… some giant space object? Aliens? Will they entertain the idea that it was mass suicide–one that took so many other life forms with them? Will that give them pause to reflect on their own way of life, that they might not repeat our folly?