Scientists are investigating the reasons some plants still wear last season’s tattered clothes.

Above: This photo tells an entire story. Taken at Roan Mountain State Park in Tennessee in January, it shows most of the deciduous trees are bare. However, you can easily see the light tan colors of ...

The spiky, iconic Canadian maple leaf. A large, lush Florida palm leaf. Thin aspen leaves rustling in the crisp Colorado air. You can probably recall many different leaf shapes from many different ...