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This simple question posed by ecologist Fred Smith led to profound discoveries about delicate balance and styles of regulation in healthy ecosystems, a topic covered in a new book Alva Noë considers.

Most young children who are extra choosy about what they'll eat eventually outgrow the habit. But research finds that in extreme cases, the pickiness may be linked to depression or social anxiety.

Early Air Force experiments helped pave the way for the space program. Joseph Kittinger, who jumped from a balloon 103,000 feet up, talks about his experience.

About 15 percent of people in prison are infected with hepatitis C. Screening and treating inmates would save $750 million over 30 years and prevent many new cases in the general public.

How people sit or where their arms and legs are in the images they share loom large in potential daters' calculations, according to experiments involving speed dating and an online dating app.

Patients in San Diego used small medical devices, synced with an iPhone, to keep tabs on their chronic diseases. Their reliance on hospitals, emergency rooms and doctor visits did not go down.

A new study suggests the Red Planet had some blue on it around 3.5 billion years ago.

A new study suggests the Red Planet had some blue on it around 3.5 billion years ago

The White House has approved NASA's call for four more years for the International Space Station, ensuring that the orbiting science laboratory will keep going for another decade, according to documents obtained by The Orlando Sentinel.

The ways learning happens in the US are shifting rapidly. We're out to capture learning in its natural habitat, from soccer fields to science labs, boardrooms to bedrooms. Welcome to NPR Ed.