The leaves of fall are one of the most gorgeous gifts from nature. Every year, we ask you to share your best photo of the season. And as usual, you didn't disappoint.

It's a Gizmodo tradition. Every year, we ask you to photograph the beautiful colors of fall. So for this week's Shooting Challenge, we want you to share your best fall photos, taken any time this year.

At some point when you were a wee child, your parents or teachers probably gave you a simple—but incomplete—explanation of why leaves change color in the fall: green chlorophyll fades to reveal the yellows and oranges that have been there all along. That's true, but that's not the whole chemical story.

Update 9/2015: Due to pressure from the anti-science blogger known as the Food Babe (whom we hold in extremely high regard around these parts), Starbucks Pumpkin Spice Lattes™ now have pumpkin in them. But we maintain that they are still an affront to humanity.

It's become something of a tradition. Every autumn, we enlist you to take the most beautiful photos of the most beautiful season that you can. And every year, you outdo yourselves.

A lot of people celebrate the foods of spring—the first green things that sprout from the ground after a thaw. But if spring is about revitalization, autumn is about comfort—sweet and savory spiced foods that fatten you up for winter and pair perfectly with a nap.

This week marks the end of summer and the first days of fall. It also marks the start of fourth annual Fall Shooting Challenge. Don't worry if things are still green by you—the results aren't due next week—but you can enter starting...NOW!

This video is a bit slow to start, but those who hold out for the 30-second mark will be richly rewarded. What an absolutely stunning use of the timelapse medium. Filmmaker Jamie Scott describes his process:

It's become an annual tradition here on Gizmodo's Shooting Challenge, to photograph the gorgeous season of fall. We're a bit delayed with Sandy, but results are due next Monday. Your photos could have been taken any time in 2012.

Every year, the arrival of fall heralds one of nature's most magnificent transformations.
And while many will witness the green leaves of summer foliage transition into a vibrant spectrum of colors before falling from their trees, few will stop to ask why these color changes occur in the first place.

Every year, the arrival of fall heralds one of nature's most magnificent transformations.
And while many will witness the green leaves of summer foliage transition into a vibrant spectrum of colors before falling from their trees, few will stop to ask why these color changes occur in the first place.

All that pumpkin-y goodness that comes with the fall holidays—tech Jack O'Lanterns, delicious pumpkin pies—has been spoiled by the wild wreck that was Irene. Farmers along the east coast are now warning that we're facing an extreme pumpkin shortage.

Across much of the world, autumn is the most beautiful time of the year. To celebrate, Gizmodo photographers assembled en masse to capture every color and texture of the season, just to share here with you.

This gorgeous photograph of a tree-lined avenue in Nottinghamshire, England, demonstrates a basic principle of chemistry.

Winter's not here, yet autumn's magic is already leaving. But thanks to a group of sneaky artists we can see the fall season frozen in time in the form of 200 carefully arranged leaves, some wire, and plenty of LEDs.

That hulking tankbot might look scary as hell if he were all alone, but somehow those falling leaves make the piece seem calm and serene. Bizarre, isn't it? German concept artist Lorenz Hideyoshi Ruwwe loves robots, gaming, and creating art. He's got everything from concept art, to finished digital designs to his own…