Paul Offit of the Perelman School of Medicine says that immunization rates are starting to decline as people become less comfortable and more cynical about vaccines.

Rogers M. Smith of the School of Arts & Sciences says that it’s ambiguous whether birthright citizenship applies to the children of unauthorized aliens.

David Zaring of the Wharton School says that the idea of a professionalized civil service has been around since the 19th century.

Kate Shaw of Penn Carey Law says that a clash between the executive and judicial branches of the federal government would add to an ongoing constitutional crisis.

According to a report by security researchers from Penn and hardware conglomerate Cisco, DeepSeek’s AI model is vulnerable to jailbreaking.

A study by postdoc Pei Wern Chin of the School of Arts & Sciences found that anxiety behaviors in mice could be controlled by either stimulating or inhibiting the neurons that release serotonin in the cerebellum.

According to an analysis by the Penn Wharton Budget Model, the SAVE student loan repayment plan could cost taxpayers as much as $475 billion over a decade.

Sarah Paoletti of Penn Carey Law says that ICE is limited in its ability to come into homes and detain people without a warrant.

Robert Schwab of the Perelman School of Medicine says that, if statins worked perfectly, cardiovascular disease wouldn’t remain the leading cause of death worldwide.

A study by Kent Smetters of the Penn Wharton Budget Model and colleagues estimates that cutting taxes on Social Security benefits could cost the federal government $1.5 trillion during the next decade and exacerbate Social Security’s projected funding shortfalls.