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Announcing Sacred Mounds, a novel of Magical Realism and Historical Fantasy from Jim Metzner, with a foreword by Hutke Fields, principal chief of the Natchez Nation.
Cyclonic hordes of insects, a telepathic despot, body-swapping sex - just a few of the surprises Salvador Samuels encounters when he is swept back to pre-colonial times, walking in the moccasins of a blind Indian - who, in turn, has been transported into Salvador's body in present-day America. Sacred Mounds Book Cover Four hundred years apart, they are bound by a mission to rescue our world, aided by the mysterious presence of the mounds. Thousands of these ancient earthworks once dotted the landscape of North America. We still don't know why they were created. Sacred Mounds suggests they are as important today as when they were made over a thousand years ago. Sacred Mounds weaves the stories of two men, each a stranger in a strange land. With the help of two remarkable women, they must find a way to save our planet and return home.
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The Lobster's Violin: Why They Do It: The Pulse of the Planet daily radio program offers free legal online mp3 downloads, exploring the world of sound in nature, culture and science, with audio adventures, world music, extraordinary sound portraits, science diaries, and nature ring-tones; an amazing sonic experience.

Airdate: Sep 21, 2007
Scientist: Sheila Patek

The Lobster's Violin: Why They Do It

The Lobster's Violin: Why They Do It
Spiny lobsters are particularly vulnerable during their molting stage, but uniquely equipped to ward off predators with a deafening sound.


ambience: Lobster sounds

We’re listening to a spiny lobster attempting to scare away predators. But unlike other creatures with hard outer skeletons, it uses soft body parts to produce these sounds. We’ll find out why in a moment. I’m Jim Metzner and this is Pulse of the Planet. Sheila Patek is a postdoctoral fellow at the University of California in Berkeley. She says that the spiny lobster - like other fellow arthropods - periodically sheds its outer skeleton.

“So, unlike humans and mammals where you can grow by growing your internal skeleton and the outside shapes to that internal skeleton, arthropods only can grow by actually shedding their outside skeleton and building a larger one underneath it. And so they go through a process called molting where they grow a new skeleton under the old one. They shed the old one, and then there’s a larger skeleton that’s that emerges.”

That larger skeleton takes a few days to harden, though. And while it does, these tasty crustaceans are especially vulnerable to being eaten. And so they make this loud noise to startle predators into letting go of them.

“So, if your body’s completely soft and you need to use sound to deter predators, and there are no hard parts -- it’s going to be difficult. But spiny lobsters -- since they use a soft part against a smooth part -- can actually produce a deafening noise when they’re molting and when they most need to deter predators and when other structural defenses are compromised.”

Pulse of the Planet is made possible by the National Science Foundation. I'm Jim Metzner.