Fertile points of view

I came across two interesting tidbits from Wittgenstein recently. First, a quote:

“What a Copernicus or a Darwin really achieved was not the discovery of a true theory but a fertile point of view.”

And this is a story about Wittgenstein told by Richard Dawkins in a recent lecture entitled "Queerer than We Suppose: the Strangeness of Science":

"Tell me," Wittgenstein asked a friend “why do people always say it was natural for men to assume that the sun went round the earth, rather than that the earth was rotating?”

His friend replied, “Well, obviously, because it looks as if the sun is going round the earth.”

Wittgenstein responded--and you have to think about this--“well, what would it have looked like if it had looked as though the earth was rotating?”

You can watch the whole lecture here. (WMV).