When: April 2011
Where: The O'Reilly Factor
Watch the hate

Before he was a beloved contestant on Dancing with the Stars, Bill Nye was the Science Guy to a generation of school children. Nye hasn't backed off of his science advocacy, though his show is long over.

In 2011, O'Reilly dug up the one remaining meteorologist who doesn't believe in global warming to debate Nye on his show. Accuweather meteorologist Joe Bastardi and Nye duked it out. True to his Science Guy roots, Nye brought visual aids. The meteorologist responded with the classic Fox News tactic of speaking louder than the person he was debating. Nye calmly pointed out that Bastardi was using doctored statistics and O'Reilly brought the segment to an end. We're going to give The Science Guy the win on this one.