IT wasn’t quite the slip-up (or slip-down, as it were) most people expect during a presidential campaign, but whatever happened to Ron Paul’s eyebrows at Tuesday night’s debate certainly caught some viewers’ attention.

For those of you not yet riveted by the Republican race, Mr. Paul, the dark-horse libertarian with equally dusky brows, was a victim of hot lights, faulty adhesive or merely a devilish optical illusion when his right eyebrow seemed to dip toward the stage at Dartmouth College.

Seen on television, Mr. Paul appeared to have a second, thinner brow under the one headed south, creating a delicate X over his right eye.