We learned in science class that leaves change color every autumn.
Days grow shorter, nights get longer and biochemical processes in the leaves begin to change the color of the leaves. Chlorophyll gives leaves their great summer green color, but as the amount of sunlight shortens, the chlorophyll is destroyed and leaves start turning.
But some years are more brilliant than others.
Why? I'll show you in this edition of Weather Whys. Watch in the video player above.