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There's a growing trend of hiking up mountains — in skis. Though it's banned at some resorts for safety reasons, enthusiasts in Aspen want make the town a hub for the emerging sport.

Tight elasticized socks, sleeves and T-shirts supposedly make you a better athlete. But alas, science is pouring some cold water on those alluring claims.

People are often told to walk 10,000 steps a day to be healthy. But if your goal is to avoid being crippled by knee arthritis, just 6,000 a day will do it, a study finds. And 3,000 is a good start.

Degan Ali, a Somali humanitarian, tells us about her organization's efforts to fight famine in Kenya, Somalia and South Sudan.

Programmer Andy Weir had always longed to read science fiction with a greater focus on science. So, he wrote a novel of his own — which has since become a best-seller and, now, a blockbuster film.

Months after Malaysia Airlines Flight MH370 disappeared from radar screens, families of the lost passengers and crew struggle to cope. Many are unwilling to declare their loved ones dead.

Astrophysicist Neil deGrasse Tyson is everywhere these days. And his current stature is remarkable, in part because he's a black astrophysicist — seemingly as elusive a phenomenon as the Higgs boson.

The ABC News correspondent was almost killed in Iraq 10 years ago. His recovery and return to network journalism beat all the odds.

More than 16,000 children have lost a parent to Ebola. Almost all of these children have found a home with a relative, but they still lack basic needs, such as food and clothes for school.

It's a tough life for many of the Syrian kids who are now refugees in Lebanon: working in the fields up to 14 hours a day instead of going to school.