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slash UK slash AI for people. Welcome to a special edition of Science Talk, the weekly podcast

of Scientific American posted on October 5th, 2009.

I'm Steve Merskin.

In this episode, we'll replay an interview with Harvard Medical School biologist Jack Shostack.

Very early this morning, Shostack was informed he had shared the 2009 Nobel Prize in Physiology or Medicine.

We'll also play a telephone interview conducted by a scientific American editor, George Musser,

with Jonathan Mostow, director of the new Bruce Willis sci-fi thriller, Surrogates.

To let you know about Jack Shostack, here's today's daily podcast about the Nobel Prize.

The 2009 Nobel Prize in Physiology or Medicine goes to Harvard's Jack Shostack,

Johns Hopkins, Carol Greider, and Elizabeth Blackburn at UC San Francisco for their work on how

chromosomes are protected by telomeres and the enzyme telomerase. The Nobel laureates research

helped explain how an organism's DNA is successfully copied when cells divide. Telemers are genetic sequences that act

like little protective caps at the end of chromosomes. Think of the sealed tips of your shoelaces.

Telomerase is the enzyme that builds telomeres. Blackburn and Jostak determined that it was a

specific DNA sequence in the telomeres that kept chromosomes from fraying whenever they were copied

when a cell splits in two.

Blackburn and Grider discovered telomerase. The findings have implications for the understanding

...