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

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

This Is Why Some Trees Don’t Drop Dead Leaves

Why do some trees not lose their leaves in winter? And why do leaves sometimes not change color in fall? Get expert answers.

Scientists can't agree on why some autumn leaves go red

Leaves often turn brilliant colors in autumn. One of those colors has generated a lot of heated debate among scientists in recent years.
Westword

The Root of the Problem? Tree Branches Everywhere, and Someone Has to Clean Them Up

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WSB Radio

Consider the leaves

Fall is ushered in by shorter days, cooler temperatures, football games all weekend long, and by falling leaves. When late ...