A new analysis of particles believed to be from the bottom of oceans inside Enceladus suggests the moon is toasty warm.
An assistant chief will replace Tom Jackson; a Justice Department probe following the shooting death of Michael Brown had found serious problems in how the department operated.
Federal law requires publicly-funded medical researchers to promptly report the results of many experimental treatments. But few are doing so, a review shows, and patients may be hurt.
Trials are underway to see how effective a pill approved for HIV prevention in adults may be for teenagers. But some worry Truvada could end up encouraging reckless sexual behavior among young people.
This week, Wisconsin joined two dozen other states with laws saying workers can't be forced to join labor unions to keep a job. But as more states move to weaken unions, the unions are fighting back.
This sea monster swam Earth's seas about 480 million years ago and was the biggest creature of its day, scientists say.
Demand for palm oil is destroying the habitat of endangered Sumatran orangutans. One group is working to rescue, rehabilitate and reintroduce these often-orphaned primates back into the wild.
Thousands of Iraqis and Afghans have been resettled in the U.S. through a special visa program, but hundreds of cases are on hold.
Last year, Congress tried to make getting care for vets easier by giving them the option of going outside of VA facilities. Seems pretty simple, but making that rule work hasn't been all that easy.
Israelis and Palestinians have now been living cheek-and-jowl in the West Bank for decades. NPR's Steve Inskeep visited both communities to sample their views in this enduring conflict.