The large number of cases suggests that excrement entered the food system on a “surprising scale.”

The changes are costing homeowners money. But they also reflect a changing grid — and the need for home batteries.

People in Sandpoint, Idaho, don’t know how to characterize a woman’s brush with a transgender woman in a Y.M.C.A. locker room, but the emergency call that followed is still reverberating.

Eighteen Americans were isolated for weeks in a Nebraska quarantine facility after being exposed to the deadly virus on a cruise ship. Many found the experience traumatic.

Israel has not been held accountable for its actions in Gaza. The nation and the individuals and countries enabling it to escape punishment may only benefit.

Genetic prediction models are poised to revolutionize medicine. But because they have been trained on European DNA, they threaten to widen health care disparities.