We asked poultry experts to explain what’s behind the shade of your egg yolk, from pale yellow to deep orange.

After half a century, New York City is retiring its iconic orange and yellow subway cars. This year, the Metropolitan ...

The iconic "school bus yellow" was the invention of an educator named Frank Cyr. But if yellow is so good for visibility, why ...

Every autumn we revel in the beauty of the fall colors. The mixture of red, purple, orange and yellow is the result of chemical processes that take place in the tree as the seasons change from summer ...

The metasequoia trees at the Songya Lake National Wetland Park in Changsha, Hunan province, have recently donned beautiful ...