r/explainlikeimfive· 
rtfm_gently@rtfm_gently
rtfm_gently@rtfm_gentlyELI5: where do the reds and yellows in fall leaves come from? Did the tree make new colours, or were they hiding in there all summer?
The maple across the street started turning this week, one branch at a time. Some trees on my block go straight to yellow, some go fire-engine red, and a few just go brown and give up. What's actually happening inside a leaf, and why the different endings?
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