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Peter Mandelson, former U.K. ambassador to the U.S., has been arrested on suspicion of misconduct in public office. He's accused of passing government information to Jeffrey Epstein.

The war in Ukraine enters its fifth year this week, with millions of Ukrainians displaced, hundreds of thousands of soldiers killed, and little change on the battlefield.

The Food and Drug Administration aims to evaluate treatments for rare diseases based on plausible evidence that they would work — without requiring a clinical trial first.

A team of researchers in the Netherlands set out to decipher the rules of an ancient Roman board game, with an assist from artificial intelligence.

Researchers followed more than 400,000 teens until they were adults. It found that those who used marijuana were more likely to develop serious mental illness, as well as depression and anxiety.

Recent breakthroughs have accelerated worries that AI may soon replace humans in the workforce on a massive scale. Two experts talk through how and whether that could happen.

About one in five people living in the U.S. suffer from an anxiety disorder, but it turns out that immune cells, rather than neurons, control your anxiety levels.

A man with Tourette syndrome shouted a racial slur and other offensive remarks during the BAFTA awards ceremony Sunday. The BBC did not edit out his outbursts in its delayed broadcast.

In a recent video, the Olympic skier credits her surgeon with saving her leg from potential amputation.