Following is a transcript of the video. [gasps] [grunts] [squeals] Caroline Aghajanian: Ooh! Oh, God! Thank you so much for coming on here and teaching me how to wax today. [grunts] Wow! Can you tell ...

Blueberries owe their striking color not to blue pigments, but to microscopic structures in their waxy coating that scatter blue and ultraviolet light. This natural “optical trick” could inspire ...