Astrophysicist Neil deGrasse Tyson didn't come to Penn State to talk about astrophysics.
By Adam Smeltz
. . . Early on, Tyson brought a rhetorical knife to cut down popular mythology over purported alien visits and unidentified flying objects.
Imagine, he said, if you see "lights in the sky and don't what they are."
"If you don't know what it is, you don't know know what it is. You don't make stuff up" just to support theories that lack evidence, Tyson said. " ... The human brain is one of the most deceptive data-taking (devices) there is."
. . . "The government is really bad at keeping secrets," he said, laughing off cover-up theories about alien activity. " . . .