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.

In moving to ban a potent synthetic version of kratom, the president’s team paved the way for more sales for makers of rival botanic supplements, who had aggressively lobbied for the change.

The lawsuit argues that new federal rules went beyond what Congress enacted and broke from guidance that the federal government previewed to states.