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Global sturgeon populations are collapsing — most notably in Russia, where caviar is known as black gold. That's fueling a market for illegal caviar and driving poachers to the Columbia River.

This week in politics: Jeb Bush isn't doing a great job of separating himself from his brother, the GOP's diversity problem and were the polls really wrong again?

Decisions about high blood pressure have gotten thornier over the past couple of years. There's no consensus on when to start treatment with drugs. The latest evidence adds to the confusion.

It takes an IndyCar pit crew about seven seconds to replace four tires and refuel. It's high stakes on race day and a lot can go wrong in the pits. One misstep can cost a race — or worse.

For an authentically Irish St. Patrick's Day meal, why not give the blaa a try? This roll from the town of Waterford is a protected Irish food heritage product, and the subject of fierce allegiances.

Honey is nature's gift. It's natural. Made by bees. Chocolate is the opposite, a great engineering creation that could, just possibly, just maybe, help save our planet.

It turns out that when scientists collaborate internationally, they are more like to have an impact on science than purely domestic collaborations.

South Africa's Mponeng gold mine is a 2.5-mile-deep network of chutes and tunnels that employs about 4,000 miners. Of course, that number doesn't include the miners who wander its tunnels clandestinely, stealing and refining ore. In a new book, journalist Matthew Hart investigates why gold and crime sometimes go hand in hand.

President Trump has nominated Judge Neil Gorsuch to the U.S. Supreme Court. NPR's Scott Simon talks with Yale Law Professor Stephen Carter about his reputation and qualifications.

They are a concise lesson in world history, reflecting wars won and lost, economic growth and decline and a country's overall standing in the world.