Katherine Unger Baillie

Fish skin is unique in that it lacks keratin, the fibrous protein found in mammalian skin that provides a barrier against the environment. Instead, the epithelial cells of fish skin are in direct contact with the immediate environment: water.

[flickr]72157635183569499[/flickr] Photos by Scott Spitzer A stone’s throw from bustling 38th Street, just off Hamilton Walk, lies a carefully curated green oasis, and nearby, a soaring glass-walled structure where plants from the exotic to the mundane are cared for and studied.

Lord Alfred Tennyson described nature as “red in tooth and claw,” yet species from ants to humans consistently defy that depiction with acts of generosity and cooperation.

Researchers from the University of Pennsylvania have demonstrated a new mechanism for extracting energy from light, a finding that could improve technologies for generating electricity from solar energy and lead to more efficient optoelectronic devices used in communications.

Two doctoral students from the University of Pennsylvania, Nam Woo Cho of the Perelman School of Medicine and Maryam Yousefi of the School of Veterinary Medicine, have received International Student Research Fellowships from the Howar

With new insights into the classical game theory match-up known as the “Prisoner’s Dilemma,” University of Pennsylvania biologists offer a mathematically based explanation for why cooperation and generosity have evolved in nature.

An admonishment to eat your greens may take on a whole new meaning if Henry Daniell, who recently joined the faculty of the University of Pennsylvania School of Dental Medicine, has anything to do with it.

The last glacial maximum was a time when Earth’s far northern and far southern latitudes were largely covered in ice sheets and sea levels were low. Over much of the planet, glaciers were at their greatest extent roughly 20,000 years ago.

With the signing of an agricultural conservation easement this week, the University of Pennsylvania School of Veterinary Medicine has ensured that 145 acres of its New Bolton Center Campus will be protected from development and will continue

Both basic scientists and clinicians have an interest in how the cells of our body move. Cells must be mobile in order for organisms to grow, to heal, to transmit information internally, to mount immune responses and to conduct a host of other activities necessary for survival.