Featured Articles

Two people work on coding at computer.

OpenAI, DeepSeek, and Google vary widely in identifying hate speech

Neil Fasching and Yphtach Lelkes of the Annenberg School for Communication have found dramatic differences in how large language models classify hate speech, with especially large variations for language about certain demographic groups, raising concerns about bias and disproportionate harm.

9/10/2025
Medieval mathematical manuscript written in vernacular Malayalam script on palm-leaf

The poetry of ancient math

The methods and findings of pre-modern Indian mathematicians remain poorly understood. Priya Nambrath, a doctoral candidate in the School of Arts & Sciences’ Department of South Asia Studies, wants to change that.

8/19/2025
Hand holding a blood vial that reads "complement (C3 + C4)"

Decoding ancient immunity networks

A collaborative team from Penn Medicine and Penn Engineering have  unraveled the mathematics of a 500-million-year-old protein network that ‘decides’ which foreign materials are friend or foe.

6/17/2025
A diagram of areas where marigolds are native plants.

Native plants from afar

In a course led by 2024-25 McHarg Fellow Leah Kahler, students explored the movement of plants across cultures and climates, as well as the relationships between recreational and productive landscapes.

6/13/2025
Leafcutter ants moving around a bright green leaf.

What can ants and naked-mole rats teach about societal roles?

PIK Professor Shelley Berger and colleagues explored the genetic basis of labor distribution in communal-dwelling species and discovered that pathways dating back hundreds of millions of years are conserved across animal kingdoms. Their findings offer fundamental insights into complex social behaviors.

6/13/2025
Person sitting on couch watching news.

How cable news has diverged from broadcast news

A team of researchers from the Computational Social Science Lab at the University of Pennsylvania find that cable news has increasingly diverged from broadcast news in the topics covered and language used.

6/10/2025
college hall facade

Visit Penn Today

If there’s news at Penn, you’ll find it here. We strive to bring you faculty, staff, and student profiles, research updates, and the latest happenings on campus.

Visit Penn Today