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Alex Honnold has scaled the sheer face of Half Dome in Yosemite, Calif., without the aid of ropes — and entirely alone. Still, he says his big break didn't arrive until a TV producer approached him.

With the discoveries now confirmed, "The 7th period of the periodic table of elements is complete," according to the International Union of Pure and Applied Chemistry.

This year, California becomes the fifth state to legalize lethal drug prescriptions for terminally ill patients. Renee Montagne talks to Carin van Zyl, a palliative care doctor, about the options.

Founded in 1991 as a temporary shelter for Somalis, the Dadaab complex in Kenya now houses nearly half a million refugees. Ben Rawlence profiles nine of its residents in his new book, City of Thorns.

In the U.S., pastas and breads come with a dose of folic acid, a B vitamin that prevents severe neural tube birth defects. But it's not allowed in corn masa, a staple for many Hispanic women.

Service dogs help veterans with physical disabilities, and there's increased interest in using dogs for symptoms of post-traumatic stress disorder, too. A study is underway to see whether that helps.

Moira Demos and Laura Ricciardi were film students when they started working on their 10-part Netflix series about Steven Avery. "We had no money, but what we did have was time," Demos says.

As President Obama moves ahead this week with executive action on gun control, David Greene talks to New York City Police Commissioner William Bratton about gun control measures.

While most history courses start with the beginning of human civilization, roughly 10,000 years ago, Big History starts with the Big Bang. Humans don't get mentioned until halfway into the course.

Kuwait also summoned Iran's ambassador Tuesday to give him a note of protest over the failure to protect Saudi Arabia's diplomatic missions.