Penn Pix

Toss-up

Originally published on May 19, 2011

...And, action!

Originally published on May 5, 2011

String theory

Originally published on April 21, 2011

Lights on

Originally published on April 9, 2009

Biden at Penn

Originally published on March 6, 2009

Carnaval Time!

Originally published on March 5, 2009

There's Waldo

Originally published on February 19, 2009

Good dog

Originally published on February 5, 2009

Behind the Scenes

Originally published on January 22, 2009

Laser-powered research

Originally published on January 8, 2009