NPR News: Post

NPR News

Why do only some leaves turn red in the fall? Scientists can't agree on an answer

Fallen leaves show their autumn colors as they float on a puddle on a rainy morning in Overland Park, Kan. Researchers have yet to agree on why some trees

The red pigments in some fall leaves have proven to be a puzzle for researchers who debate why leaves bother to go red.

(Image credit: Charlie Riedel)

Continue Reading…