sciencehabit writes: Students and researchers alike have long understood that physics is challenging. But only now have scientists managed to prove it. It turns out that one of the most common goals in physics—finding an equation that describes how a system changes over time—is defined as "hard" by computer theory. That's bad news for physics students who hope that a machine can solve all their homework problems, but at least their future jobs in the field are safe from automation.
"Call immediately. Time is running out. We both need to do something
monstrous before we die."
-- Message from Ralph Steadman to Hunter Thompson