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Now that recreational use of marijuana is legal in four states, law enforcement officials are looking for quicker ways to test drivers for excessive pot use. Entrepreneurs are taking on the challenge.

"Allo" is Greek for "other." Alloparents are helpful relatives and neighbors. In a study from Congo, babies had 8 alloparents on average. Perhaps the self-reliant nuclear family is a societal misstep.

In 1947, a New Mexico rancher found mysterious debris on his land. UFO author Garrett Graff links the Roswell incident to the "deep state" conspiracy theories and misinformation of today.

New Yorker writer Evan Osnos explains the contentious relationship between China and the U.S. and discusses the significance and possible results of Wednesday's meeting between Biden and President Xi.

The pandemic brought notable setbacks in the effort to eradicate tuberculosis, which is likely to regain its notorious title of deadliest infectious disease in 2023. But there are signs of progress.

LaMont Dottin was a freshman at Queens College when he vanished one day in 1995. His mother became a "one-woman search party" whose journey would lead her to a mass grave.

Nobody wants to hear a baby cry. Researchers say the same techniques that soothe a colicky infant can help relieve the pain of vaccinations.

They could shoot up to 24,000 feet and maintain that altitude in a long-distance migration across the Himalayas. But it's more efficient for bar-headed geese to soar and dive, scientists find.

Longer Black Friday sale windows give companies more chances to win potential business, but it also affords consumers the ability to shop around, experts say.

The U.S. antitrust case against Google begins today. Kim Jong Un is expected to meet with Vladimir Putin in Russia. See green comet Nishimura this week before it vanishes for 400 years.