Bill Nye was everyone’s favorite TV scientist back in the 1990s. He’s come to the fore more recently, and even has a Netflix show that has opened to mixed reviews.

Still, Nye is an entertaining TV personality and a proponent of the importance of science. Nye appeared on Complex News for a recent spot, and the conversation turned to the flat earth theory and Boston Celtics guard Kyrie Irving.

Nye was bewildered by how a player, concentrated on so many small facets of the game, could believe the earth was flat.