Joe Romm of the School of Arts & Sciences says that blended gas doesn’t make sense, since the chemical nature of hydrogen will tunnel through and destroy materials like normal steel.

The Penn Wharton Budget Model estimates that annual deficits will cumulatively increase by about $3.2 trillion during the next 10 years.

Simcha Gross of the School of Arts & Sciences comments on the history of a rabbi from centuries ago in what is now Iraq.

Peter Cappelli of the Wharton School recommends writing a letter to someone or finding a known acquaintance when applying for jobs, to help circumvent all the other people applying through job boards.

Jeremy Siegel of the Wharton School discusses the latest market trends, the impact of the administration’s tariff policy, and why he remains bullish on equities.

Cheryl Bettigol of the Perelman School of Medicine and Tamara J. Cadet of the School of Social Policy & Practice argue that funding an increase in the number of social workers in the Defender Association of Philadelphia could reduce the economic and human toll of incarceration on the city’s communities.

Scientists at Penn predict that Scotch Bonnet Island in New Jersey will lose a third of its acreage by 2050.

Michael C. Horowitz of the School of Arts & Sciences and Perry World House authors a piece about autonomous weapon systems.

Anthea Butler of the School of Arts & Sciences comments on the separation of church and state.