Fan CastingApocalypse Alphabet

A is for aliens. B is for bolide. C is for climate catastrophe. D is for depletion of nonrenewable resources. E is for economic collapse. F is for [solar] flares. G is for gamma-ray burst. H is for home-made viruses. I is for infertility. J is for Judgement [a.k.a. Rapture]. K is for killer technology. L is for life suddenly depleting. M is for machine uprising. N is for nanobots. O is for overpopulation. P is for planetary collision. Q is for [strange] quarks. R is for Revelation. S is for [artificial] super-intelligence. T is for totalitarianism. U is for universal simulation. V is for [natural] viruses. W is for World War III. X is for [e]xtraterrestrial weapons. Y is for Yellowstone. Z is for zombies.