The Real Reason Peppers are Spicy

The video explores the evolution of pepper spiciness, initially thought to deter mammals. However, research suggests spiciness primarily defends against insects and fungi. Capsaicin, the compound responsible for spiciness, is effective against fungal growth and insect damage. The direct deterrent hypothesis, which posits that spiciness evolved to deter mammals, is challenged by evidence showing mammals, including humans, can tolerate and even enjoy spicy foods. Spiciness correlates with climate factors like rainfall, supporting the idea that it evolved as a defense against environmental threats rather than mammals.

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