Every time you flush, your poo and pee start an epic journey. From the toilet, to the sewers, to a treatment plant, our waste travels quite a distance only to end up cleaner by the end. We'll hear from a "PooTube" star about her experience with "the flush." We'll also hear about ancient sewers, a "fatberg" under London and a toilet that cleans waste on site. ... Show More
Jul 14
Why are brains so squishy?
Our brains are amazing machines, but they are also very delicate. We have to wear helmets when we bike, skate, or do other activities where we might bang our skulls. Why is the brain so sensitive? Turns out, it’s a soft blob a lot like tofu, but that softness lets it do some pret ... Show More
34 m