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Researchers say Colombia offers a chance to learn more about Zika's possible link to microcephaly. If the country sees a sudden rise in cases as Brazil did, that's stronger evidence of a connection.

Astronomers have known about the powerful pulses but had never been able to catch one in the act to help figure out what's producing them. Last year, they got one.

Hayden is a former president of the American Library Association and is currently CEO of the Enoch Pratt Free Library in Baltimore.

Death Valley, Calif., one of the hottest places in the world, is in bloom with more than 20 species of desert wildflowers. It's the biggest bloom the park has seen in a decade.

Since the protests in Ferguson, Mo., police departments have rushed to adopt body cameras. But local laws governing their use are all over the map. See the laws in your state.

In the city of Qom, ayatollahs and hardliners fret that their government relinquished too much in its nuclear deal with the U.S. and other world powers. "God knows what we gave up," says an ayatollah.

Over 20 people have been sickened in two new outbreaks of foodborne illness linked to alfalfa sprouts. For something many deem a "health food," sprouts continue to be a vexing food-safety challenge.

When is a migrant a refugee? The answer comes down to how U.S. judges read one sentence in a 1980 law. Each ruling could mean the difference between life and death for thousands of Central Americans.

"It's not good to just be a doctor," said the mother. The daughter, encountering HIV patients suffering from depression in Uganda, lived up to her mother's vision.

The brain usually relies on our senses to navigate. But researchers found that when people experienced virtual teleportation, their brains still managed to keep them on course.