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Physical activity has a range of benefits for children, yet many schools have cut back on gym and recess. Now a British study finds that children who were most active at age 11 did better academically through the teenage years. Active girls did particularly well in science, while both boys and girls had better scores in English.

Over the next few months people across the U.S. will have to make decisions about health coverage. The questions about how that it will all work keep coming in, with people seeking details about available plans and the size of the penalties if they don't comply.

The tide of public opinion appears to be rapidly turning in favor of legalization. In November 2012, Gallup found that 48 percent of Americans favored marijuana legalization. Now that figure is at 58 percent.

Starting in April, the federal agency that surveys the nation's waters will offer charts only via on-demand printing, as PDFs or electronic charts.

The shutdown delayed the updating and testing of some of the IRS' systems. The original start date of tax season was Jan. 21. now it'll start no earlier than Jan. 28 and no later than Feb. 4.

A team led by Emily Thompson, a history professor at Princeton, has matched noise complaints from New York City in the Roaring '20s with the actual street sounds of the day.

When House Democrats are briefed about the implementation of the Affordable Care Act Wednesday, they'll be looking for assurances that the federal website's problems will be ironed out.

The idea was that Medicaid would expand to include people not covered under the Affordable Care Act. But many states have chosen not to expand coverage, despite financial incentives from the federal government. That may leave millions of people without any health coverage at all.

A cholera outbreak in Mexico has been traced to the same strain that first appeared in Haiti three years ago. It has appeared in the Dominican Republic and Cuba, too. So far nearly 9,000 people have died in the four countries, and health authorities think it will spread farther in the Americas.

Over the past decade, local governments have demolished millions of homes as China rushes toward urbanization. Protests against such land seizures have taken a disturbing turn recently: A 42-year-old rice farmer set himself on fire last month when authorities came to his home. There have been more than 50 such cases since 2009.