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Hidden History

Archeologists continue to hunt for the city of Atlantis, even though it may never have existed. But, what if it did? Its discovery would change ancient history. Sometimes when we dig around in the past, we can change our understanding of how we got to where we are.

We thought we had wrapped up the death of the dinosaurs: blame it on an asteroid. But evidence unearthed in Antarctica and elsewhere suggests the rock from space wasn’t the sole culprit.

Also, digging into our genetic past can turn up surprising – and sometimes uncomfortable truths – from ancestral origins to genes that code for disease. But do we always want to know?

Guests:

•   Mark Adams – author, Meet Me in Atlantis: My Obsessive Quest to Find the Sunken City

•   David Morrison – Senior scientist, NASA Ames Research Center

•   Peter Ward – Paleontologist, University of Washington, author of A New History of Life: The Radical New Discoveries about the Origins and Evolution of Life on Earth

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•   Christine Kenneally – Journalist and author of The Invisible History of the Human Race: How DNA and History Shape Our Identities and Our Futures

Power to the People

ENCORE  Let there be light! Well, it’s easy to do: just flip a switch. But it took more than the invention of the light bulb to make that possible. It required new technology for the distribution of electricity. And that came, not so much from Thomas Edison, but from a Serbian genius named Nikola Tesla.

Hear his story plus ideas on what might be the breakthrough energy innovations of the future. Perhaps hydrogen-fueled cars, nuclear fusion electrical generators or even orbiting solar cells?

Plus, a reminder of cutting-edge technology back in Napoleon’s day: lighthouses.

Guests:

•   W. Bernard Carlson – Professor of science, technology and society, University of Virginia, and author of Tesla: Inventor of the Electrical Age

•   Michael Dunne – Physicist, program director for laser fusion energy, Lawrence Livermore National Laboratory

•   R. Tom Baker – Chemist, director of the Center for Catalysis Research and Innovation, University of Ottawa

•   Paul Young – Radio engineer, director of Powersat Ltd.

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•   Theresa Levitt – Historian, University of Mississippi, and author of A Short Bright Flash: Augustin Fresnel and the Birth of the Modern Lighthouse

 

First released September 30, 2013.

Melty dunes

Cosmic Diary by Lori Fenton - March 18, 2015

A Piece of Mars: With all due apologies to followers of the show Coupling, I have to call these things “melty dunes”. This link shows what a crisp dune should look like. The dunes in this 600×450 m (0.37×0.28 mi) scene, however, have rounded crests and sand that seems to have ponded around the bottom of the dunes. These are common at high southern latitudes on Mars. (HiRISE ESP_039610_1150, NASA/JPL/Univ. of Arizona)

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