What’s That?

What’s That? Black squirrels

Penn Today spoke to Sarah Tomke in the School of Veterinary Medicine’s Wildlife Futures Program about the black squirrels regularly seen on College Green. They are black because of a genetic mutation in the melanin receptor protein, which regulates pigment.

Louisa Shepard

What’s That? The Rittenhouse Orrery

The Rittenhouse Orrery is a nearly intact 18th-century mechanical model of the solar system, demonstrating the motions of the planets and their satellites around the sun, built by astronomer David Rittenhouse.

Louisa Shepard

What’s That? Fox-Fels Hall

‘The mansion’ is home to the Fels Institute of Government, Penn's graduate school for public policy and public management. 

Kristen de Groot