Ira Flatow greeting Neil deGrasse Tyson with a fist bump.
Richard Dawkins being Richard Dawkins
Bill Nye being Bill Nye
The importance of educating women in science
Neil deGrasse Tyson flipping out at Lawrence Krauss and Brian Greene about the motivations behind big-budget science
Tyson and Krauss bickering about pretty much anything (there’s a lot the two don’t see eye to eye on)
When you should and shouldn’t respect other people’s opinion
The role of science-/speculative fiction in communicating and understanding science (Dawkins, for one, claims he came to understand information theory through SF. Bill Nye thinks contemporary scifi cifi could stand to return to its days of intense optimism, as characterized by Star Trek.)