The Next Idea One afternoon while waiting for my flight to board, a headline caught my eye: “ Civilization-Destroying Comets Are More Common Than We Thought .” I assumed it was one of those flashy clickbait attention-grabbers like the ones about how researchers have discovered how you can lose ten pounds just by drinking dandelion tea. Much to my surprise, it wasn’t one of those smarmy websites you’ve never heard of. It was Popular Mechanics . Yes, that do-it-yourself periodical for the pocket