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His candidacy has floundered, so the Wisconsin governor is going back to what made him a hero to Republicans — taking on labor unions. But his sweeping efforts will likely run into stiff resistance.

How did a modestly-sized, developing country become dominant in sprinting?

Loneliness takes a toll on many aspects of health, in part because it activates a fight-or-flight immune response. That may have helped ancestors survive lonely exile, but can slowly kill us today.

As it falls, snow forms a sort of net for catching pollutants in the atmosphere. Pesticides and dirt from soil can also end up in there. Still, most researchers told us they'd eat it, with caveats.

With its vibrant watercolor illustrations and delicate hand-lettered recipes, artist Marcella Kriebel's cookbook is as much an art project as a manual for making tasty meals from Latin America.

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.

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.

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.

Whatever Congress might come up with would certainly be controversial — and this is an election year. That hasn't stopped some lawmakers from taking sides in the privacy vs. national security debate.

As he approaches his 90th birthday, the energetic, award-winning actor shares his tips on how to enjoy aging — and has a new book to prove it. It's all about attitude and staying active, he says.