Briefing Chat: Stressed mitochondria spawn new 'organelles' in cells

"On behalf of President Donald J. Trump," read 22 emails sent from the White House Presidential Personnel Office on Friday afternoon, April 24, 2026, "I am writing to inform you that your position as a member of the National Science Board is terminated, effective immediately."

New Penn research shows that Hurricane Ida wasn't a once-in-a-century anomaly but a preview of how climate change, urbanization, and aging infrastructure are rewriting flood risk.

Wildfires can increase flooding risks in and downstream of burned areas by removing vegetation and disturbing hydrologic processes. As the climate changes, the severity of both wildfires and heavy rainfall events is increasing, meaning flooding is likely to become more severe in the near future. Better understanding how, and by how much, wildfires change flood risk is important for disaster and infrastructure planning for communities around the country.