The majority of humans become lactose intolerant as they grow up. Learn how ancient herders changed our digestive gene pool in this episode of BrainStuff, based on this article: https://health.howstuffworks.com/wellness/food-nutrition/facts/humans-built-drink-milk-adults.htm See...

https://auto.howstuffworks.com/car-driving-safety/auto-safety-testing/escape-sinking-car.htm; https://auto.howstuffworks.com/car-driving-safety/safety-regulatory-devices/auto-glass.htm See omnystudio.com/listener for privacy information.

Cherry blossom trees are so celebrated because their beautiful blooms are so short-lived. Learn about these trees (and how so many wound up in Washington, D.C.) in this episode of BrainStuff, based on this article:...