Progress

This is how the world works, according to my nuclear engineering professor (who, by the way, is probably the smartest person I know, which is why I can't take any more classes from him: I don't live up to his standards).

"You would think that when a new idea comes up in the scientific community, people would read about it and discuss it and then, if it's a good idea, they'd come to a consensus and move on. Sometimes that happens, but not very often.

"You really get progress because all the old people with outdated ideas die or retire and then they are replaced by people who accept the new ideas."

Encouraging.