After weeks of anti-U.S. rhetoric that included denunciations of President Obama, Philippine President Rodrigo Duterte has announced "I have separated from them," using his remarks during a state visit to China to seek closer ties with that country.

Snakes used to wander the Earth on legs about 150 million years ago, before they shifted from strut to slither.

Now, two scientists have pinpointed the genetic process that caused snakes to lose their legs. What's more, they say the "molecular machinery" for leg development still persists in snakes after these millions of years — it's simply switched off.

Unexplained fainting episodes may be caused by a dangerous blood clot in the lung more frequently than many doctors suspect, according to an Italian study.

Episodes of fainting (known as syncope) are quite common in elderly people. About half the time, doctors identify an underlying heart condition. Other cases are caused by shock or some other passing cause. But many cases remain mysterious.

Updated Dec. 6, 2017, at 11:35 a.m. ET.

For the first time, President Trump publicly addressed allegations against Alabama Republican Senate candidate Roy Moore on Tuesday. The president defended Moore, who is accused of making unwanted sexual advances toward teenage girls as young as 14 when he was in his 30s.

"Let me just tell you, Roy Moore denies it," Trump said. "That's all I can say. He denies it. And by the way, he totally denies it."

Whether it's jet lag, a new work schedule, daylight saving time or just a Monday morning, shifting sleep schedules takes a toll. But scientists think they might have found a way to reset our internal timers that's more than hot air.

At least, it works if you're a mouse. The solution, it seems, is thin air. A study published Thursday in the journal Cell Metabolism found that decreasing oxygen levels for a short period of time helped mice recover from jet lag faster.

As Donald Trump and Hillary Clinton shook hands with moderator Chris Wallace and greeted their families after the end of Wednesday night's presidential debate, the broadcast hosts delivered their verdict.

"All six of the 15-minute segments — total home runs for him," said Cliff Sims. "I think this was really the performance that Donald Trump needed to grab that momentum going toward the election."

His co-host, Boris Epshteyn, agreed: "He prosecuted the case against Hillary Clinton perfectly."

Donald Trump at Wednesday's presidential debate refused to say whether he would honor the results of the Nov. 8 election. But is that just a tease meant to build suspense?

Democratic vice presidential nominee Tim Kaine tells Morning Edition host Steve Inskeep he doubts that.

On a blistering 90-degree day, Nelly Carrillo stands over her stove, placing a chorizo and potato sope onto the oiled cast-iron skillet. The thick, fried tortilla sizzles, and she wipes sweat off her brow with the back of her softly wrinkled hands. You can hear a cacophony of honking cars and voices in the near distance.

Huang Xian'er came of age while watching Internet celebrities' streaming videos on her smartphone in western China's Yinchuan city.

"My mom knew I was watching Internet stars in school," she recalls. "She simplistically thought that all Internet stars sell clothes, get plastic surgery and all look the same."

Dorothy's ruby slippers could use a little more magic these days — or at least some preservationist TLC.

The famous shoes from The Wizard of Oz are among the most popular items on display at the Smithsonian's National Museum of American History. But they're showing their age, and the museum is asking the public to pitch in to help keep the shoes intact for decades to come.

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Ruth Simmons officially named 8th President of Prairie View A&M University

The Board of Regents of the Texas A&M University System unanimously voted Monday to name Dr. Ruth J. Simmons, a nationally recognized leader in higher education, as the 8th president of Prairie View A