International House Philadelphia, 3701 Chestnut St.
Katherine Unger Baillie covers the School of Veterinary Medicine, the School of Dental Medicine, and in the School of Arts and Sciences, manages media relations for biology, earth and environmental science, and history and sociology of science. She also occasionally covers scientific research coming from other parts of Penn.
Dramatic calorie restriction, diets reduced by 40 percent of a normal calorie total, have long been known to extend health span, the duration of disease-free aging, in animal studies, and even to extend life span in most animal species examined.
Population-based epidemiological studies provide new opportunities for innovation and collaboration among researchers addressing pressing global-health concerns.
Each spring and fall, birds take wing on journeys of thousands of miles, seeking prime breeding habitats or safe and comfortable places to ride out the winter.
By mid-February, winter’s freezing temperatures and drab landscapes can seem like they will last forever. But for at least one staff member at Penn, spring’s verdant bounty is never far from her mind.
As part of a breast-cancer diagnosis, doctors analyze the tumor to determine which therapies might best attack the malignancy. But for patients whose cancer is triple-negative — that is, lacking receptors for estrogen, progesterone and Her2 — the options for treatment dwindle. Triple-negative cancers, or TNBC, also tend to be more aggressive than other cancer subtypes.
Breast cancer mortality rates have steadily declined over the past few decades, thanks to a combination of early detection and improved treatments. But for patients diagnosed with triple-negative breast cancer (TNBC), a subtype in which tumor cells lack receptors for estrogen, progesterone, and Her2, no targeted treatments are available.
While crisscrossing campus this winter, careful observers may have noticed wildlife beyond the typical trash-picking squirrels and waddling pigeons. Sitting in a low tree branch or soaring between buildings, red-tailed hawks have become a common sight, surprising some unfamiliar with these adaptable birds.
According to the Guinness World Records, the longest any person has held a continuous vocal note is just shy of two minutes. That’s quite an achievement.Compared to the Pacific midshipman fish, however, the endurance of the human vocal cord is no match. Midshipman fish can generate a mating call that emits continuously from their bodies for a full hour.