Every so often I post news here of various existential threats to civilization, Earth, the universe and so on. Mainly I do this because Kendall appreciates it so much, but hopefully other people find them entertaining too.
If you are someone who likes such things, you may like to check out Charlie Stross’s blog. He has asked his readers to come up with new ideas for destroying the world. There are over 300 comments thus far. You can scare yourselves here.