JOHN DANKOSKY, HOST:
This is SCIENCE FRIDAY. I'm John Dankosky. Are you a fan of crunchy, crispy foods? Well, I am. In fact...
(SOUNDBITE OF CHEWING)
DANKOSKY: Do you hear that? Yeah, that's a potato chip. It sounds pretty good, doesn't it? Now, no matter where you are in the world, you'll probably find that that crunch is popular with the locals. Think about it: tortilla chips, crispy chicken, fried calamari, biscotti, tempura, falafel, pekora - mmm, pekora.