This episode is presented by eBay.

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importantly, free. It's free, Rob. When it's this easy to sell for free and there's great

deals on things you love. You can't help but say when it's eBay. It excludes vehicles and business

sellers.

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Welcome to the Scientific American podcast, Talk posted on June 18, 2013.

I'm Steve Murski.

On this episode, the other strange thing or surprising thing about many grinding operations

is it's the hard thing that breaks off and the substrate, that which holds, in this case,

the whiskers, is so flexible that it doesn't get ground off.

And that is, of course, Bill Nye, the science guy.

He's involved with a promotion connected with the new Superman movie,

which presented a good opportunity to talk

with one of the champions of science outreach in the U.S. I spoke to him by phone before the movie

opened. Bill Nye, of course, the science guy. Why don't you tell us about this particular

project that you're involved with? Well, the Man of Steel is the latest manifestation of everyone's beloved Superman.

And I think part of the reason Superman is such a hit and stands the test of time.

...