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Researchers say that in countries where clean water and soap are plentiful, there may be no additional benefit from installing sanitizer dispensers in classrooms.

The urine test employers typically use to detect marijuana picks up cannabis smoked or swallowed days or weeks earlier. Should firms be allowed to fire workers who legally use marijuana at home?

Faced with an Ebola outbreak that keeps spreading, WHO has endorsed the idea of using unproven vaccines or treatments.

The study will take place over five years and will test of the safety of a new treatment involving neural stem cells.

New footage shows dramatic operations to help people stranded in mountains in northern Iraq. As people flee militants, the Pentagon says its airstrikes have slowed but not stopped the Islamic State.

Strong rip currents and higher than normal surf is expected this weekend, forecasters said.

Charles Cumming hooks NPR book reviewer Alan Cheuse with his latest spy novel, A Colder War. It's a tense and tangled tale of a British agent hunting the truth behind a mysterious death in Istanbul.

Iselle was forecast to weaken, but that hasn't happened. Officials are saying the island is ready, but they are urging everyone to prepare.

The outcome of the hearing could put more pressure on the Supreme Court to make a decision on states' same-sex marriage bans.

The National Weather Service issues a beach hazards advisory for areas north of Solana Beach due to the rip currents and 3- to 5-foot surf until Thursday evening.