I'm going through my A-Word-a-day e-mails. I have a bad habit of not reading messages and letting them accumulate. But I just found this quote from a 2/23 e-mail and thought I'd share:

"In science it often happens that scientists say, "You know that's a really
good argument; my position is mistaken," and then they would actually
change their minds and you never hear that old view from them again. They
really do it. It doesn't happen as often as it should, because scientists
are human and change is sometimes painful. But it happens every day. I
cannot recall the last time something like that happened in politics or
religion."

- Carl Sagan, astronomer and writer (1934-1996)