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Despite issues with her heart, this octogenarian still competes in triathlons. She's proof that preventive medicine paired with smart lifestyle choices help seniors stay active longer.

Interior Secretary Doug Burgum says "excavation work" will begin in the next two weeks, without approval from a key federal body. Veterans who sued over the arch want a judge to intervene before then.

About 4 percent of teenage boys and 6 percent of teenage girls have PTSD. Many of them have physical symptoms related to their stress, including problems sleeping, weight gain and hair loss. Researchers are trying to identify which parts of the brain are affected by PTSD so they can come up with more ways to treat the disorder.

The state's new ethics law bans nearly all gifts to government workers — including schoolteachers. Teachers who accept anything more than a trinket of "little intrinsic value" could face fines up to $6,000.

Villagers in Al-Qosh opened homes and schools to Iraqis fleeing the advance of the Islamic State. But that was June. Now it's a ghost town, as silent as its 6th-century monastery.

Vice President Biden says it appears that the Malaysia Airlines jet with nearly 300 people aboard was "blown out of the sky" over eastern Ukraine.

Scientists first figured the claw-tipped, giant arm bones found in 1965 belonged to an ostrichlike dinosaur. But its recently recovered skull looks more like a dino designed by a committee — of kids.

The challenge to university students around the world: Come up with a way to provide quality education to slum kids under age 6. And the winner of the $1 million Hult Prize is ...

Richard Barrett, the former director of global counterterrorism operations at the British intelligence service MI6, talks about what Russia is trying to achieve in Syria.

Some 3,000 Afghan elders will assemble on Thursday in Kabul to consider a new security agreement with the U.S. The document will spell out the rules for American forces in Afghanistan troops after their combat mission ends in December 2014. U.S. officials say between 6,000 and 9,000 US troops would remain to train Afghan security forces and conduct counter-terror missions against al-Qaeda and other anti-government forces. That counter-terror mission remains a sticking point, though most other issues — like potential criminal liability of Americans in Afghanistan — have been resolved.