Neil deGrasse Tyson gets stumped by Katy Perry, the smartest girl in the world. PewDiePie delivers once again.
Perry: Is math related to science?
Tyson: Most people who could be born, will never be born. Will never even exist.
Perry: Like sperm…
Tyson: Well, sure, yeah yeah-
Perry: But it’s science!
Tyson: The rest don’t.
Perry: So where do they go?
Tyson: They’re dead!
Later, Perry waxed philosophical.
Perry: I wanna become a scientist now.
Tyson: NO! uh, we need you, we need you on the stage. When you’re done on the stage then we’ll take you in.
Perry: I might be done on the stage.
Tyson: [bursts into laughter]