E.P.A. Proposes Limits on Nitrogen Oxides

Nitrogen oxides, a group of gases from the burning of fossil fuels, is linked to a range of health effects.

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Iran Declares It Is Doing More Nuclear Enrichment After I.A.E.A. Rebuke

With thousands of advanced centrifuges on standby, Tehran says it is now spinning more, which could increase its stockpile of near-bomb-grade atomic fuel.

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Dr Martin Makary Chosen to Head the FDA

A frequent Fox News commentator, Dr. Makary has a penchant for challenging the medical establishment, and stirred pandemic concerns with his views on Covid immunity and vaccine mandates.

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So Many Days Lost at the Doctor’s Office

Medical care can be wearying and time-consuming, especially for seniors. Researchers are beginning to quantify the burdens.

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Great Apes and Tiny Bears: Chasing Wild Thrills in Borneo

This Southeast Asian island, home to some of the world’s strangest and most iconic creatures, is a dream destination for a growing number of “mammal watchers.”

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Uranus and Neptune May Conceal Vast Oceans of Water

A scientist simulated the contents of the ice giant worlds, and found that a fluid layer may explain each planet’s strange magnetic field.

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High-Intensity Drinking Is Worse Than Binge Drinking

And it’s on the rise among middle-aged drinkers.

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Trump Picks Stanford Physician Dr. Jay Bhattacharya to Head N.I.H.

As the director of the National Institutes of Health, Dr. Jay Bhattacharya would oversee the world’s premier medical research agency, with a $48 billion budget and 27 separate institutes and centers.

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Book Review: ‘The Miraculous From the Material,’ by Alan Lightman

In “The Miraculous From the Material,” the best-selling author Alan Lightman examines the science behind the wonder.

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A Stray Dog Climbed an Egyptian Pyramid. Along Came a Paraglider.

A video of a dog on a pyramid took off on social media — but only after it was appropriated and doctored.

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