Talk of the Nation

As the climate changes, scientists are documenting measurable shifts in the natural world — from a tremendous loss in Arctic sea ice and an increase in extreme weather like drought, floods and heatwaves, to the migration of plants and animals to new latitudes.

The Supreme Court has delivered a split ruling on Arizona's immigration law, striking down several key elements but upholding the "show me your papers" provision. The controversial provision allows local police to check the immigration status of people they stop in the normal course of their duties.

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IRA FLATOW, HOST:

Ever wonder why you worked so hard to avoid the lasagna at dinner only to give in to your craving for not one but two helpings of cake for dessert? Well, new research may hold some answers to this vexing question. A new study in the Journal of Consumer Psychology confirms what we've been - what we've known for some time, and that is each of us has an internal reservoir of self-control. We have a reservoir of self-control that it depletes. Every time we resist a temptation, we use a little bit of it up.

Transcript

IRA FLATOW, HOST:

Transcript

IRA FLATOW, HOST:

Thirty-five years ago, NASA launched a pair of spacecraft called Voyager 1 and 2 in hopes of learning more about the outer planets of solar system, those big gas giants. The Voyagers beamed back dazzling close-ups of the big red spot on Jupiter and the rings of Saturn, but scientists wanted to see even more of what's out there, see how far the Voyagers could go before running out of fuel.

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IRA FLATOW, HOST:

This is SCIENCE FRIDAY. I'm Ira Flatow. Last week, China launched its Shenzhou spacecraft into orbit, carrying three taikonauts, one of whom was a woman, China's first female astronaut. A few days later, the spaceship crept up on the Tiangong space lab in orbit and docked with it, making China one of only three countries to have pulled off such a feat after the U.S. and the Soviet Union.

Philadelphia's Mütter Museum has a lot of heart, and other organs too. Items in this collection of medical specimens include a gangrenous hand, a wallet made of human flesh, and a colon the size of a medium suitcase. And that's just the stuff on display, imagine what's in the basement.

What if you needed a new toothbrush and all you had to do was hit print? What if doctors could print out transplantable organs and pastry chefs turned to a printer, not a kitchen, for their next creation? Ira Flatow and a panel of guests discuss 3D printing technology, how far it's come and what a 3D-printed-future could look like.

A pair of Canadian skyscrapers have been dubbed the "Marilyn Monroe" towers due to their shapely form. In Abu Dhabi, twin towers are shielded from the sun by computer-controlled shading screens. Architect Antony Wood discusses features of some tall buildings that make them standouts across the world.

The operation was run by the Bureau of Alcohol, Tobacco, Firearms and Explosives in 2009-10. NPR's Ted Robbins and Michel Marizco of the Fronteras Desk talk about the intent of Fast and Furious, why the operation failed, and solutions to curb gun-running on the U.S.-Mexican border.