In the study of frowning, Dr. Finzi injected Botox into the frown muscles of half of a group of 74 people diagnosed with depression, which prevented these patients from frowning.

WSJ: Stress-Busting Smiles

The two-second shot in which, on set, as the cameras roll, Valentin locks into a brooding frown the standby of the questing smolderer earns a laugh for sheer precision, and, behind such face-making, you sense a lot of homework.

NEWYORKER: Better Times

Deans frown on professors' poaching corporate clients but are hesitant to ban independent work, since those engagements give professors insights into companies and help schools forge ties with potential employers.

WSJ: Executive Education: Professors Are Now Brands