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Why are yawns contagious? Why do we hiccup? How do teeth get loose? Why do your ears hurt when you drive up over the mountains? Why do we get dizzy when…

Why do your fingers and toes turn wrinkly in the tub? Why are people ticklish? How do you get freckles? Why do some people have birthmarks? How do our…

How do popcorn kernels pop? How do salmon know where to return to spawn? How do rabbits change colors? Why does television fry your brain? How do zippers…

Why is all of the world split up into countries, states, cities and counties and more? Why can't we all just live as one big group? Which country has the least amount of people? We're talking about countries and borders with author Juan Enriquez. Also in this episode: why don't school buses have seatbelts?

How is chocolate made? Why can't we eat chocolate all the time? Why does chocolate melt? Why can't dogs eat chocolate? In this episode, we travel to Taza…