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One panel threw out subsidies in the 36 states that did not set up their own insurance exchanges. Another said the IRS rule that set them up was legal.

Alexander Litvinenko, a critic of Vladimir Putin, died in 2006 after drinking tea laced with radioactive polonium-210. The inquiry would identify "where responsibility for the death lies."

If the decision stands, at least 5 million Americans would face an insurance premium increases of at least 76 percent, according to one estimate. The case could wind up in the Supreme Court.

The Ormia ochracea fly has sophisticated little ears — it can locate crickets by calculating their chirps. Those super-ears are inspiring the next generation of microphones for human hearing aids.

This may be the most heart-rending, most beautiful eclipse in our solar system. But you can't travel to see it. Not yet.

The largest outbreak in history is giving birth to what may be the largest outbreak of Ebola rumors. It's a curse! It's carried by mosquitoes. Or ... a snake. Here's a look at what people are saying.

Researchers have stumbled on an ingenious idea: Use bubble wrap as a cheap test tube and petri dish. They've even run tests on blood that's sitting inside the poppable packaging. So how does it work?

Arthur Allen's new book, The Fantastic Laboratory of Dr. Weigl, describes how a WWII scientist in Poland smuggled the typhus vaccine to Jews — while his team made a weakened version for the Nazis.

A plant in Tonawanda heats coal into material for the iron and steel industries, releasing toxic chemicals into the air. Residents have long blamed the pollution for several health problems.

Two different U.S. appeals courts issued opposing verdicts on the Affordable Care Act, one striking down a crucial component of the law while another upheld the same component. NPR's Mara Liasson unravels the political consequences of the conflicting decisions.