I took my biology student son to see Neil deGrasse Tyson. We wanted to hear about science, or at least about science education, but politics broke out and my son walked out.
Tyson does not style himself a politician, but he sold out the Fox Theater, and politics was what his audience hungered for. So he delivered, with a full-throated defense of liberal scientific values, the kind of talk Howard Dean gave against George W. Bush 12 years ago.
Then he backed away from the punch line, and left me with some hard questions to consider.