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Here's why the smell of pumpkin spice moves us, according to science

Four boxes full of pumpkins

Pumpkins stacked up at Tulleys farm in Crawley, England, on Friday. The U.S. celebrates National Pumpkin Day every Oct. 26. (Dan Kitwood/Getty Images)

Happy National Pumpkin Day! There's no time like the present to stock up on decorative gourds, carve a spooky jack-o-lantern or sip on a PSL (... at least according to the pumpkin lobby, aka Big Pumpkin, not to be confused with the Charlie Brown special).

Pumpkin spice everything has been everywhere since literally August. Whether you love it or hate it, you can't deny that it's a staple of autumn in America.

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