San Francisco's mayor on Tuesday declared a local emergency to make it easier for the populous city and international travel hub to combat novel coronavirus if it comes -- even while stressing that it isn't there yet.

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Losing your spouse or life partner and gaining the designation "widow" or "widower" is one of life's cruelest blows.

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A woman insisted she needed a liver transplant. But doctors wouldn't allow it, removing her from waiting lists and recommending treatment for alcohol addiction instead.

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Girls can't do math. Boys can't read.

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As my wife, daughters and I hiked through the woods at one of the many state parks near our home, I explained to them how we were doing three things that were simultaneously boosting our happiness at that moment.

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Ultramarathoners and other endurance runners take note: You can't rely on electrolyte sports drinks and supplements to keep essential salt levels in balance and prevent illness during and after these grueling races, according to a new study.

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If sperm was an animal, science might worry that it's heading toward extinction in Western nations.

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India has once again topped an annual list of cities with the worst air quality in the world, according to a new report, while Chinese cities have continued to show improvements from the previous year.

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The world's oldest living man, Chitetsu Watanabe, has passed away in Japan at the age of 112, the Niigata prefecture government said in a statement Tuesday.

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Heart disease is the number one killer of people worldwide.

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Yet more bragging rights are in for the Mediterranean diet, long considered to be one of the healthiest in the world.

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The word "fat" has haunted Harriet White her entire life.

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My mother was one of four sisters. I have a younger sister, and between the two of us, we have four daughters.

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A new study has linked a later bedtime with an increased risk of obesity for kids -- although the researchers say parents shouldn't rush to put their preschoolers to sleep earlier as a result.

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Coverage of the Harvey Weinstein trail and verdict may have elicited strong emotions for some people.

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