How does your body know you’re full? TED-Ed

Hunger claws at your belly. It tugs at your intestines, which begin to writhe, aching to be fed. Being hungry generates a powerful and often unpleasant physical sensation that’s almost impossible to ignore. After you’ve reacted by gorging on your morning pancakes, you start to experience an opposing force: fullness. But how does your body actually know when you’re full? Hilary Coller explains. Lesson by Hilary Coller, directed by Sashko Danylenko.

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Survival of the Sneakiest

“Survival of the fittest” means that the strong succeed; or does it? The struggle for survival isn’t the only struggle that living things have to win. This comic from Evolution Berkeley takes students through the adaptations that crickets have evolved due to sexual selection. When teaching evolution, it is important to show students that natural and sexual selection are two sides of the same coin.

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