In Massachusetts, the octogenarian senator Ed Markey faces a challenge from a much younger centrist, Representative Seth Moulton.

Travis Fuller was from my hometown. I went back and talked with his family about how they made sense of his death, 25 years after Sept. 11.

Three fourths of Americans oppose data centers. Why?

Rajendra Dawadi had less than 15 minutes to act on a warning of approaching floodwaters. His swift evacuation plan saved hundreds of lives.

Given access to email, A.I. agents have started reaching out to the philosophers and researchers exploring deep questions about them.

The authorities in Nepal and Tibet said that more than 4,400 people were missing since a deadly Himalayan landslide and glacial collapse. Rescuers are searching for survivors.

At least $1 billion from anonymous donors is flowing into the midterm elections. Dark money is not new, but it now permeates nearly every major contest.

State officials say they worry about the Postal Service’s ability to deliver votes this fall. They are urging voters to mail their ballots early or use drop boxes so their votes count.

A growing number of former Israeli generals, intelligence officials and prime ministers are accusing settlers in the West Bank of committing ethnic cleansing with government support. “Once a society behaves this way,” one said, “that society is doomed.”