How the War in Gaza Drove Israel’s A.I. Experiments

Israel developed new artificial intelligence tools to gain an advantage in the war. The technologies have sometimes led to fatal consequences.

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Study Links High Fluoride Exposure to Lower I.Q. in Children

The results of a new federal analysis were drawn from studies conducted in other countries, where drinking water contains more fluoride than in the United States.

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E.P.A. Again Seeks Limits on a Harmful Pesticide

After a court overturned a ban, the agency has proposed restricting chlorpyrifos to 11 food crops, illustrating the limits of federal regulation.

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