Bill Nye, the harmless children’s edu-tainer known as “The Science Guy,” managed to offend a select group of adults in Waco, Texas at a presentation, when he suggested that the moon does not emit light, but instead reflects the light of the sun.

As even most elementary-school graduates know, the moon reflects the light of the sun but produces no light of its own.

But don’t tell that to the good people of Waco, who were “visibly angered by what some perceived as irreverence,” according to the Waco Tribune.

Nye was in town to participate in McLennan Community College’s Distinguished Lecture Series. He gave two lectures on such unfunny and adult topics as global warming, Mars exploration, and energy consumption.