High-ranking hyena mothers pass their social networks to their cubs

Using 27 years of detailed data on hyena social interactions, a team led by Penn biologists nailed down a pattern of social network inheritance and its implications for social structure, rank, and survival.

How is a cicada like an oak tree?

Janzen, the DiMaura Professor in Biology, on why cicadas (and wildebeests, salmon, and oak trees) act the way they do.

Obscuring the truth can promote cooperation

People are more likely to cooperate if they think others are cooperating, too. New research by biologists in the School of Arts & Sciences shows that overstating the true level of cooperation in a society can increase cooperative behavior overall.

Designing public institutions that foster cooperation

People are more likely to cooperate with those they see as ‘good.’ Using a mathematical model, School of Arts & Sciences researchers found it’s possible to design systems that assess and broadcast participants’ reputations, leading to high levels of cooperation and adherence.

The use and misuse of race in health care

In a Q&A, PIK Professor Sarah Tishkoff, the Perelman School of Medicine’s Giorgio Sirugo, and Case Western Reserve University’s Scott Williams shed light on the ‘quagmire’ of race, ethnicity, genetic ancestry, and environmental factors and their contribution to health disparities.