Thanks for the info anyway, fB. Unfortunately, it wasn't one of the programs archived on the website. But maybe you could give us a gist, here, on the thread, after you're done listening to it?

I might also search through Amazon for books about or by the experts mentioned on the Nature program, anyway...

I don't know why this subject tickles my brain, so. But it does.

Sometimes, an idea can get stuck in your brain, just like a melody ;-).