Why Do Leaves Change Color and Fall?

They’re pretty to look at, sure — but the changing leaves you see in autumn are really a striking example of nature taking extreme measures to protect itself.

Hosted by: Michael Aranda
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Sources:
http://www.pbs.org/newshour/rundown/why-do-leaves-change-color/
http://www.usna.usda.gov/PhotoGallery/FallFoliage/ScienceFallColor.html
http://botit.botany.wisc.edu/Resources/
https://creativecommons.org/licenses/by/2.0/legalcode