Mar. 23, 2026 Scientists have uncovered a hidden “death switch” in the brain that may be driving Alzheimer’s disease—and even found a way to turn it off in mice. The culprit is a toxic pairing of two ...

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Part of a missile on the grounds of a school following an Iranian barrage, on Monday. Avishag Shaar-Yashuv for The New York Times TehranThe streets of Iran’s capital were mostly empty on Monday. A ...