This week, we talk to a scientist who does feline personality profiling--also known as purrsonality profiling--and we learn what big cats and small cats have in common. Plus: we talk to a man who's getting implanted with a microchip to make purchasing snacks easier. And comedian Tig Notaro joins us to take our personality test.

Are You a Boy or a Girl, Yertle?

Paula Poundstone is on a quest to gather all of the world's knowledge. Or, as she puts it, "to get less stupid, one topic at a time." Follow her search as she looks to scientists, researchers, and experts for evidence about everything from what music cats like to the fluid dynamics of spilling coffee. "Every week, we'll keep looking for knowledge," says Paula, "because we know we left it somewhere."