Research

World

Russian Cruise Missiles Were Made Just Months Ago Despite Sanctions

Weapons investigators in Kyiv found that at least one Russian Kh-101 cruise missile used in widespread attacks there on Nov.…

Business

How the Collapse of Sam Bankman-Fried’s Crypto Empire Has Disrupted A.I.

Mr. Bankman-Fried and his colleagues spent more than $530 million to battle what they saw as the dangers of artificial…

Health

The End of Vaccines at ‘Warp Speed’

Operation Warp Speed, the Trump-era program that poured billions of dollars into developing Covid shots, seemed to signal a new…

Sports

A Test for C.T.E. in the Living May Be Closer Than Ever

SHICKLEY, Neb. — Chris Eitzmann seemed to excel at everything until he didn’t. He parlayed a Harvard football captaincy into…

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