Researchers may have solved a Stonehenge mystery — and raised another. They say its central Altar Stone somehow got to England from Scotland, hundreds of miles farther away than originally thought.

When marijuana becomes a Schedule III instead of a Schedule I substance under federal rules, researchers will face fewer barriers to studying it. But there will still be some roadblocks for science.

Francis Collins has served longer than any other director of the National Institutes of Health since 1971. He tells NPR he did not anticipate the culture wars taking over scientific fact.

An experiment that induced imaginary sounds in both people and mice could help explain how brain disorders like schizophrenia cause hallucinations.

Faced with a glut of pandemic research from around the world, scientists are confronting their biases and learning to engage with science conducted at institutions they're unfamiliar with.