E.P.A. Will Erase Limits on Climate Pollution From Power Plants

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Is A.I. Raising the Chances of Biological Warfare?

Some in Silicon Valley Are Questioning the Calls for an A.I. Slowdown

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Trying to Rid the Pentagon of Culture Wars, Hegseth Has Created His Own

Alaska Sen. Dan Sullivan Walks a Tricky Line on Tariffs as He Seeks Re-Election

As Midterms Rage, Gillibrand Wants Congress to Talk Menopause