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Sweating in a sauna feels good, and it's associated with health benefits including a lower risk of heart disease. But is that because of the heat, or because you're able to kick back and relax?

Smartphones have become an extension of the owner; it is the closest we've ever become to being omnipresent and omniscient and — in a metaphorical sense, at least — divine, says Marcelo Gleiser.

While the federal health law made insurers cover the full cost of screening colonoscopies, consumers with a history of polyps who need more frequent tests may have to pick up some costs.

Many specialists in family leave policy say the tax credits included in the new federal law are too small to persuade most employers to offer such benefits.

A newer type of breast imaging costs more. It's not yet clear if the three-dimensional approach is more effective at catching cancers that will kill.

Officials want health care providers to discuss how medical marijuana could interact with other medications or care, but doctors still can't point vets to state-approved marijuana programs.

In California, the flu has struck early and hard this season. Health experts aren't sure why. The state's higher temperatures typically result in a later flu peak there than in other parts of the U.S.

Employing science's methodology is key — as it's the best antidote we have to the very human propensity to turn something we want to believe into a reality, says astrophysicist Marcelo Gleiser.

The electronic pill looks like the biggest multivitamin a human could possibly swallow. Tests have show that the experimental device can measure gases tied to microbes and digestion.

As many families prepare for a visit from Santa, and some face questions about the jolly old man in the red suit, a new study looks at how children react to surprising claims, says Tania Lombrozo.