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The C.D.C.'s tobacco control office has been shut for more than a year. After its most prominent antismoking campaign went off the air, calls to 1-800-QUIT-NOW lines have plummeted.

The makers of nicotine pouches are building new plants and expanding to meet demand. While influencers claim health benefits, experts warn the products can be highly addictive.

Popular communication methods for nonspeaking autistic people have ignited a fierce debate over what counts as evidence of hidden cognitive abilities.

The neurobiologist Erich Jarvis studies the few species capable of speech. He has long hoped to genetically engineer an animal that can make new calls.

While relief could come to the Great Lakes and the far Northeast over the weekend, the Mid-Atlantic and Southeast will stay hot.

Public health experts said there were more cases than usual of the disease caused by cyclospora, which is spread through contaminated food and drink.

The rodent-borne virus, which sickened passengers on the MV Hondius, killed three people, led to a race to find its origin and a global health alert.

The metric of how hot the air actually feels has roots in a 1979 journal paper called "The Assessment of Sultriness."

New research shows that tolerance has become so strong that common treatments for opioid addiction are no longer effective for many patients.

Federal officials in Los Angeles described gang members' yearslong scheme that relied on social media and physical violence to recruit and maintain control of the girls.