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Ask an expert: The artifice of colour and nature

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Published: 21 Sep 2006

In the most recent installment of this popular feature, anthropology prof John Galaty answers the age-old question, "Why are stop lights red, caution lights yellow and go lights green?" Go to find out more. No, stop. OK, you can go now.

In the most recent installment of this popular feature, anthropology prof John Galaty answers the age-old question, "Why are stop lights red, caution lights yellow and go lights green?" Go to find out more. No, stop. OK, you can go now.
Source Site: /newsroom
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