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Weekend Edition Saturday Host Scott Simon talks with bioethicist Arthur Caplan of New York University about Thursday's Supreme Court ruling that isolated human genes may not be patented — and the implications for that ruling.

The Syrian war has been raging for two years, yet the rebel fighters are relatively unknown. The U.S. decision to provide weapons will put a spotlight on the rebels, who cover a broad spectrum, from secular nationalists to Islamist extremists.

Promises from big food companies to switch to "cage-free" eggs have set off a supply chain reaction among egg producers. Some producers are adding more cage-free houses to their operations. But scientists are still trying to measure whether cage-free chickens are really better off.

Wolfe tells Fresh Air's Dave Davies that what makes Miami exceptional is the story of how an immigrant community rose to dominate its political landscape in just over a generation. His new novel deals with racial and ethnic conflict among the city's diverse inhabitants.

Some critics are puzzled by Mitt Romney's opposition to the Affordable Care Act because the law is a close cousin of the measure he signed while governor of Massachusetts. But others counter that the private sector is best left to make the changes imposed by President Obama's signature achievement.

The country's love of sheep had the perfect ingredients for an American Idol-style reality show. Khar Bii ("This Sheep") began as a joke but has blossomed into a success story and a television show that is now in its fourth season, with loyal, record audiences nationwide.

Because of a unique collaboration between Quakers, Italians and Mexicans, half the nation's mushrooms are grown on farms near Kennett Square in southeastern Pennsylvania.

Decades ago, kids were encouraged to play outside and explore the outdoors. Nowadays, protective parents have reined in their children, leading to strictly structured (and supervised) playtime. The kids don't seem to be fighting it, but do these new rules stymie childhood creativity?

Nathan Wolfe travels to the viral hot spots of the world, where viruses first jump from animals to humans. The scientist spends his days tracking emerging infectious diseases before they turn into global pandemics.

The latest jobs report was good news for President Obama and not so much for Mitt Romney, whose campaign has been predicated on the argument that a bad economy requires a change in White House occupancy.