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Millions of people want caffeine removed from their coffee. Millions more want caffeine added to their soda. Little-known caffeine factories, scattered across the world, satisfy both desires.

California regulators say autonomous cars should have a licensed driver, but a top Google engineer says that makes as much sense as putting a steering wheel or brake pedal in the back of a cab.

It's a spring religious festival in India. People spatter each other with colored powder and spray lots of water. This year's drought is changing the tradition — to the dismay of many.

Long before cooking was common, early humans needed extra energy to fuel bigger bodies and brains. Scientists say simple stone cutting tools likely allowed small-toothed meat eaters to thrive.

NPR's "Day 1" series looks at major issues the next president will face in office. One issue is that Americans still aren't seeing big raises, even though the job market is slowly recovering.

The metric of sheer page views only goes so far. We wanted to see which posts resonated enough with people that a high rate of readers shared them with friends and followers.

In the 1940s, recording engineers perfected new sound techniques that were used in World War II — and which launched a hi-fi revolution. Lloyd Schwartz reviews the new 53-CD Decca box set.

Italian midfielder Andrea Pirlo is one of a number of older European stars to sign with an MLS team. While their presence may boost the league, it has led to criticism of MLS as a "retirement home."

The Alabama Crimson Tide take on the Clemson Tigers in tomorrow's college national championship football game. It's the second year for a new playoff system in college football.

Before foreign ministers gathered in Geneva, the prospect for progress on reducing tensions appeared to be be slim. But afterward, Secretary of State John Kerry said differences had been narrowed.