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World's Most Important Travel Innovations

World's Most Important Travel Innovations: Foam Earplugs

Courtesy of 3M Company

Foam Earplugs

Anyone sitting near a colicky baby on a flight just had to suck it up until 1972, when the Cabot Corporation’s Ross Gardner introduced this sleep-saving tool, which expands in the ear canal to block out noise. —Aimee Lee Ball

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