Driven by the artificial intelligence frenzy, Microsoft is internally projecting that water use at its data centers will more than double by 2030 from 2020, including in places that face shortages.

Companies like Kairos Power are building new types of reactors with the encouragement of the Trump administration, but their success is far from assured.

© Ramsay de Give for The New York Times

How some of the world’s most precise clocks missed a very small beat.

© R. Eskalis/National Institute of Standards and Technology

Trump Media plans to merge with a company developing nuclear fusion technology, putting the president’s financial interests in competition with other energy companies over which his administration holds sway.

© Pete Marovich for The New York Times