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Why So Many Sperm?

Friday, November 21, 2008

Matthew Cobb takes us back to 1677, when Anton Van Leewenhoek first identified sperm and there was much talk of souls and miniature men residing in the seminal fluid. Upon observation it became clear that there were an awful lot of those little guys that never turned into babies! Jad wonders: why so many sperm? Bird-sex specialist Tim Birkhead, of the University of Sheffield, explains what effect imperfect monogamy has on reproductive strategies. Then sperm physiologist Joanna Ellington and her pig Hazel give us some insight into the obstacles sperm must overcome in their odyssey from their male originator to their female destination.

more on Anton Van Leeuwenhoek
Tim Birkhead's book, Promiscuity
drawing: seeingimonkey/flickrCC
see the Homunculus (man in the sperm)
Matthew Cobb's book, Generation


Comments

  • [1] J Ong from 10007 November 25, 2008 - 03:12PM

    I enjoyed listening to this episode and went to the podcast on iTunes to hear it again. To my dismay, it's truncated, only about ten minutes long. Can somebody please correct this?

    Thank you very much.


  • [2] Lulu from WNYC November 25, 2008 - 03:50PM

    J-

    The whole episode will be podcast on December 2. The podcast you heard was a little "sperm preview" shorty podcast. But until then, you can hear it as streaming audio right here on this page!

    many thanks!


  • [3] ligeti42 November 26, 2008 - 11:44PM

    I'm sorry, but the interminable story of a girl seeking her biological father is just pathetic. And it ends with a schmaltzy song? What are we supposed to learn from this? And for god's sake, please let up on the hyperediting... Give your audience some room to imagine things for themselves. Seriously.


  • [4] Jason from D.C. November 28, 2008 - 03:01PM

    What's the song played about 20 minutes into the episode? Thanks.


  • [5] Laura Germano from Jacksonville, FL December 02, 2008 - 10:39PM

    Another interesting journey - like Jason from D.C., I was interested to know the music played during this podcast. Thanks


  • [6] Lulu from WNYC December 03, 2008 - 02:43PM

    Hi Laura + Jason. The song is “Salvese Quien Pueda (Juana’s Epic Re-Version)” by Juana Molina. She's amazing!


  • [7] Eric from Madison, WI December 04, 2008 - 06:06PM

    Just checked out Jauna Molina thanks to these comments. She has an incredible sound. Thanks for the tip!


  • [8] Todd Nadenichek from Chicago December 10, 2008 - 12:25PM

    Hi. What's the song about 3:30 into the podcast? It's some kind of a men's choir. Have you folks considered listing the music that you use in each episode, if it's available? thanks so much.


  • [9] Eric from Houston December 10, 2008 - 04:39PM

    Really enjoyed the episode, glad to know I wasn't the only one interested in finding out who that one artist was and somebody did my work for me!


  • [10] Jason Sullivan from Richmond, VA December 15, 2008 - 11:26AM

    I too came here to find out who was responsible for that amazing Spanish language song about 20 min in. Thanks, Lulu -- I'm now a Juana Molina fan!


  • [11] Kristy Huljak from Cincinnati, OH January 11, 2009 - 10:24PM

    I'm a big NPR fan, but this was the first Radio Lab I've heard. It was very interesting, funny, heartwarming - I loved it! I'll be back on the dial next weekend and I've forwarded the link to many friends!


  • [12] laura from Baton Rouge, LA February 04, 2009 - 09:56AM

    The first part of the episode (Why So Many?) is fantastic. Loved it. Not so much the other two...human interest stories are great and all, but This American Life's got that covered. I turn to you all when I want my mind to be blown. And you almost always deliver. Thank you!

    p.s. as for the editing, I love it.


  • [13] Owen Miller from Providence, RI March 31, 2009 - 05:33PM

    As always, great show. My brother (who went to Oberlin) got me hooked. However, I noticed a misnomer in the first part of the show. The man who discovered the wonderful penis-scooper of the damselfly (similar to the dragonfly) was Jon, not Jeff, Waage. As a student of his, I was excited to hear about him, and I had to write something!


  • [14] Tom Niemisto from New York April 01, 2009 - 12:43PM

    I saw this new site and it made me think of the sperm episode.

    http://www.sundancechannel.com/greenporno/


  • [15] Rachel November 16, 2009 - 06:31PM

    I have to disagree with ligeti42. I thought the story about the girl looking for her father was incredibly touching and the editing is really dynamic.

    Great episode!


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