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 to winter. During the spring and summer the leaves have ...

it’s the fantastic hues you get as the leaves turn to buttery yellow, burnt orange and lava red. Plants which produce ...

Yellow rust primarily impacts wheat crops and can cause significant economic impacts with reports of up to 50% yield loss ...

Chlorophyll is what makes leaves green. Leaves also contain carotenoids, which produce yellow, orange and brown colors. In ...

The USPS often releases new designs for stamps, such as the fishing-themed images on last week's new set of Forever Stamps, or stamps that commemorate public holidays, or the advent of a new year.

March 17, 2025 - STRONGSVILLE, OH — The U.S. Postal Service celebrates the colorful sights of autumnal walks with the release of five new Vibrant Leaves postcard stamps. Each stamp showcases a single ...