Red means “stop,” but what about blue? Drivers are noticing more than one stop sign color ... Blue remained part of the traffic light color scheme up until 1973 when government moved to ...

“The lights are a beautiful reminder of the American spirit,” said Roma Daravi, vice president of public relations at the ...

When white light strikes a blue feather, the keratin pattern causes red and yellow wavelengths to cancel each other out, while blue wavelengths of light reinforce and amplify one another and ...