As the clock ticks toward the end times, it’s easy to lose faith in humanity’s ability to endure. But we can’t give up. — Asteroids, supervolcanoes, nuclear war, climate change, engineered viruses, artificial intelligence, and even aliens — the end may be closer than you think. This is the last in a series of essays drawn from editor Bryan Walsh’s new book End Times: A Brief Guide to the End of the World, which…