India's Chenab-Beas tunnel could redirect Himalayan water, raising major engineering and geopolitical questions.

The same 40 million people up and down the Colorado River are lining up for an ever-shrinking supply of water.

The Commerce Department is planning to lean heavily on industry and outside groups to shape a new AI exports program, but insiders say this week's "chaotic" rollout has fallen short. Why it matters: ...

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