
A red octagonal sign. You know exactly what this means, don't you?
There are a few symbols throughout the world that are universal, and for good reason. If a person needs to stop to avoid being hit by traffic, they better get the hint quick – no matter what language they speak.
This was the goal in the ‘60s, when the science community wanted to make a universal symbol for a biohazardous item. So, engineer Charles Baldwin teamed up with a marketing firm to find a symbol that didn’t have a particular meaning for most folks, but that was memorable.
What they found was the circular, horn-like look of the modern biohazard sign stuck in people's head. So, they rolled out a campaign assigning the symbol to danger, driving home the point by putting it on a bright orange background.
The campaign worked, and the symbol is used internationally to this day.
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