School of Arts & Sciences

If one were to take a liquid — any liquid — and cool it down rapidly enough so that it doesn’t have a chance to crystallize, the result would be glass. Glass is so viscous that it takes too long to flow for anyone to realize that it is liquid rather than solid.

Every time a hormone is released from a cell, every time a neurotransmitter leaps across a synapse to relay a message from one neuron to another, the cell must undergo exocytosis. This is the process responsible for transporting cellular contents via lipid-encapsulated vesicles to the cell surface membrane and then incorporating or secreting them through membrane fusion.

If you held a ball up to a mirror, it would produce an image that, if pulled out, would sit perfectly on top of the ball. Yet if you held your right hand up to a mirror, the image produced would be a left hand, which is not identical to the original; a glove for one hand cannot comfortably fit the other. 

University of Pennsylvania sophomore Celeste Marcus is studying abroad in Israel this semester, but she’s still helping a local elementary school stay connected, from nearly 6,000 miles away.

President Amy Gutmann and Provost Vincent Price are pleased to announce the appointment of Jay Gottfried as the University of Pennsylvania’s eighteenth Penn Integrates Knowledge University

​​​​​​​The University of Pennsylvania’s Lauren Sallan, an assistant professor in the School of Arts & Sciences’ Department of Earth and Environmental Science, has been selected as a

The way organizations choose to structure internal relationships among participants can create valuable social connections, if done properly, according to Amanda Barrett Cox, a fourth-year doctoral student at the University of Pennsylvania, who published her findi

At 7 years old, Arabella Uhry, now a junior at the University of Pennsylvania, developed a relationship that sparked her interest in health care.

It’s well known that, when cells are subject to stress, starvation or viral infection, they sometimes adopt a cubic architecture. Unlike the simple spherical structure of membranes in healthy cells, these cubic membranes, or cubosomes, are very complex, forming an interconnected network of water channels resembling a “plumber’s nightmare.”

Sho Hashizume, the co-ed team captain of the University of Pennsylvania’s Ping-Pong club, started playing table tennis at age 4. But for the first 10 years, he didn’t like it.