October is finally here, and with it comes more fall foliage reaching its peak throughout the U.S. Each year, as trees begin to store a chemical called chlorophyll, their leaves lose their green ...

Western Pennsylvania's fall foliage was on full display Thursday morning.Check out the gorgeous images in the video player aboveSky 4, Pittsburgh's only news chopper, flew over parts of Allegheny ...

Have you noticed autumn leaves falling a little sooner and faster where you live? Hotter temperatures and little rain across huge swaths of the country are showing up with trees changing leaves ...

Scientists have long questioned whether the vibrant colors of fall foliage serve an evolutionary purpose. One theory suggests red pigments protect leaves from sun damage, allowing trees to absorb more ...

It's officially fall in the Northern Hemisphere, which means bright, beautiful foliage isn't far behind. Parts of the U.S. will soon start to see — if they haven't already — leaves and shrubs trade ...

PORTLAND, Maine (AP) — Leaf-peeping season has arrived in the Northeast and beyond, but weeks of drought have muted this year’s autumn colors, and sent leaves fluttering to the ground earlier than ...

September's (sporadic) sweater weather chill and the changing leaf colors are a sign that the first day of fall is near. Here's what to know about the autumnal equinox and fall foliage forecast map ...