They're called "serodiscordant" couples. One is HIV positive, the other negative. Aid from the U.S. enabled them to obtain medicines and condoms for protection — until this year.

Right-wing activist Charlie Kirk has died at 31. He was shot at a college campus speaking event. And, two people who lost their fathers during 9/11 share differing views on seeking justice.

Authorities say they are still looking for the suspect, who appears to be of college age. Investigators recovered a rifle in a wooded area near campus, as well as footwear and forearm impressions.

Researchers have spent 10 years improving the massive detectors they use to catch shockwaves from colliding black holes, and now the science is precise enough to test one of Stephen Hawking's key ideas.

Israel's surprise attack in Qatar on Tuesday targeting Hamas' top political leaders was the latest in a campaign aimed at hunting down Israel's top enemies since the 2023 Hamas-led attack on Israel.

For college students who don't have a lot of money, it can be tough to wrap your head around student loans, credit cards and a tight budget. A financial educator offers advice for first-year students.

These hairy spiders spend almost all of their lives underground. But when it's time to mate, they must brave the great outdoors before they perish.

1,100 people killed on 9/11 in New York City have not had any of their remains identified by authorities. The medical examiner's office is using new technology to identify more people.

Brightline West is betting it can build the first true high-speed rail line in the U.S. But the company says costs are rising, despite its best efforts to keep them down.

Elizabeth Miller and Brett Eagleson both lost their fathers on September 11, 2001. On the 24th anniversary of the day, they remain divided on how justice should be done.