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Scientists are investigating the microscopic world that lives in and on our bodies. It's becoming clear that these tiny companions play a much more complex and important role in human health than thought. But we don't yet know enough about the microbiome to use it to prevent and treat disease.

Ceiling fans help keep you cool — unless you're in Washington, where a battle over energy-efficiency standards for ceiling fans is raising temperatures between the White House and congressional Republicans.

Texas last week became the 12th state to ban most abortions after 20 weeks. But most of the state laws don't define 20 weeks the same way doctors do.

The Duchess of Cambridge, better known to most of the world as the former Kate Middleton, has given birth to a baby boy. He weighed in at 8 pounds 6 ounces and is third in line for the throne.

After the discovery of three women's bodies in an East Cleveland neighborhood over the weekend, authorities had feared more remains would be discovered. A suspect in the killings is due in court Monday. Officials say he may have been influenced by a previous serial killer's crimes.

Mary Hvizda went viral when a Wisconsin drum shop posted video of her wailing away. At first, her identity was a mystery. But now we know who she is — and that while she's not really a grandmother, she does love to rock.

The strong temblors also destroyed hundreds of homes in Gansu province. Rescue operations have been complicated by downpours and aftershocks.

Also: Search for more murder victims ends in Cleveland; earthquakes kill dozens in China; torrential rains flood Phoenix; Pope Francis heads to Brazil; Phil Mickelson wins the British Open.

A freight train with more than 70 fuel-filled tankers derailed and exploded in a small town on the Maine border two weeks ago. Authorities are still searching in the rubble.

The "world's most endangered feline species," the Iberian lynx, faces continued pressure because its prey is disappearing. Researchers say the cats need to be introduced to parts of the Iberian peninsula that are higher in altitude and latitude.