Why are Black History Month's colors red, black, green and yellow? Here's what each color represents.

“Approximately 35% of patent Examiners allow 60% of all U.S. patents; and approximately 20% of Examiners allow only 5% of all U.S. patents. In other words, few Examiners are allowing many patents, and ...

Add Yahoo as a preferred source to see more of our stories on Google. Learn here the history behind the Black History Month colors. Pictured: A black, green, red, and yellow graphic that says The ...

There are three main types of color vision deficiency: red-green, blue-yellow, and complete. Color blindness, or color vision deficiency, affects the way you perceive color and can make it hard to ...