Free Podcast: National Geographic News (March 23, 2007)

Listen to the top nature and science news every week with your host, Peter Standring.

This week: Grand Canyon's new glass bridge; "tigers" as pets; air-powered cars; our scrappy, short-legged ancestors; and more.

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MORE ON THIS WEEK'S PODCAST

Headlines
• Ancient lizard glided using its ribs (see images)
• Virgin Galactic, NASA to develop space-plane travel (read full story)
• Human ancestors needed short legs to fight for mates (read full story)
• "Toygers" breed conservation awareness, animal-welfare concerns (read full story and see photos)

News Interview
Christian Bronsil, a project manager for French company Moteur Developpement International, talks about the firm's eco-friendly air-powered car, which he says will be available to consumers within the next two years.

Feature Interview
Sheri Yellowhawk, CEO of Grand Canyon Resort Corp. and member of the Hualapai Tribe, talks about the Skywalk—a 30-million-U.S.-dollar observation deck commissioned by the tribe that offers visitors a chance to step out 4,000 feet (1,220 meters) above the canyon floor (read full story and see photo).

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