What *is* “True North,” why is it different than “magnetic north,” and what does that have to do with the streets of Portland? We navigate the Earth’s magnetic core in this great episode. Also discussed: R2-D2 dies, flying cockroaches, rivers on Titan, Tesla saves a life, cow dust fights asthma, using crickets to find the temperature, Swedish Fish Oreos, Olympics, and Todd can’t figure out how the Big Dipper works.


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