Ask500

Michio Kaku is pretty entertaining, but seems to dwell a little beyond the cutting edge of science. Tyson is fine for astronomy. Dawkins is my favorite of these; he's willing to put himself in the line of fire for his defense of evolution and atheism.

Richard Dawkins for sure. I would ask him why does he think the Pope believes in Jesus. :-)

At one time I would have said Dawson without hesitation. Now, I would worry about him going off an a rant. Tyson always struck me as annoying on some level. People on the fringe don't think like their confreres. They are often fascinating even if you don't agree with them. Kaku it is.