NPR News

Paul Katz bought two tickets — one for himself and one for his cello — on a flight from Calgary to Los Angeles. But the captain told him his cello had to fly as checked baggage. After an agonizing flight, Katz cried when the captain returned his cello, unharmed. Originally broadcast August 27, 2012.

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NEAL CONAN, HOST:

This is TALK OF THE NATION. I'm Neal Conan in Washington. The Book of Genesis tells the story of creation, of the sea, the sky, the birds and animals and, finally, Adam. Chapter 2, Verse 7 reads: The Lord God formed man of the dust of the ground and breathed into his nostrils the breath of life, and man became a living soul. Eve was formed out of Adam's rib.

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NEAL CONAN, HOST:

This is TALK OF THE NATION. I'm Neal Conan in Washington.

Reporting in Science, researchers write that mouse stem cells can be transformed not only into egg cells--but into newborn pups. Sean Morrison, a stem cell expert at the University of Texas Southwestern, explains the stem cell's journey, and what it could mean for fertility and assisted reproduction.

In The Joy of X: A Guided Tour of Math, from One to Infinity, mathematician Steven Strogatz provides an entertaining refresher course in math, starting with the most elementary ideas, such as counting, and finishing with mind-bending theories of infinity--including the idea that some infinities can be bigger than others.