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A LITTLE SOMETHING WORTH KNOWING

A small discovery. Yours to pass on.

TechnologyOne small ahaInvention

George de Mestral developed this branded hook-and-loop fastener after studying burrs caught in fur.

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TechnologyOne small aha
Your new ahaVelcro

Velcro: A hook-and-loop fastener inspired by burrs sticking to fabric. Source: Velcro ↗

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  1. 09Jacob Perkins patented an early vapour-compression system for this food-cooling appliance.IDENTIFY
    The Refrigerator

    Jacob Perkins patented an early vapor-compression refrigeration system that made safe food storage possible.

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  2. 10Percy Spencer's work with radar equipment led to this appliance that heats food using electromagnetic waves.IDENTIFY
    The Microwave Oven

    Percy Spencer discovered microwave cooking by accident after a candy bar melted in his pocket near radar equipment.

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  3. 11Gutenberg developed this machine in fifteenth-century Mainz to reproduce pages using movable metal type.RECALL
    The Printing PressOpen this card ↗