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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.

Hospitals have been fighting to block the rankings, but Medicare released them Wednesday. Of the 102 hospitals that got a five-star rating, few are among those generally praised for great care.

Algorithms teach computers how to process language. But because they draw on human writing, they have some biases. Researchers are trying to weed out those problematic associations.

Economists are working on ways to put a price on the environmental damage of growing food. Take sugar: Half of what we eat comes from beets, half from cane. Each has an impact, in very different ways.

For Pascal Baudar, LA is a treasure trove of edible plants and insects that he uses in unusual culinary creations. He helps some of the city's top chefs put wild foods on menus and has a new cookbook.

Israel is the top recipient, by a wide margin, of U.S. foreign military aid. As the current 10-year aid package nears its end, U.S. and Israeli officials are negotiating a new and likely even bigger aid deal. Senators from both parties are prodding the White House to get a "robust" deal done; many have arms industries that will benefit. Critics call it a give away to a prosperous nation that drains spending on the home front.

Brown University student Sunil Tripathi disappeared just before the Boston Marathon bombing, and was accused of being involved in the attack. A new documentary looks at the effects of the allegation.

The Texas senator has largely been out of the headlines after his third-place showing in New Hampshire. But that was not a bad finish for him, and now the calendar is shaping up better for him.

He had the resume — swing-state governor, veteran, ex-party leader — but there's a good chance you had no idea he was running. Judging by vote totals, Iowa and New Hampshire may have missed it too.