Red leaf, yellow leaf
18 July 2018
Why do some leaves turn yellow in autumn, while others turn red?
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Premium
18 July 2018
Why do some leaves turn yellow in autumn, while others turn red?
18 July 2018
A golf ball has dimples on its surface to increase the efficiency of airflow over it and let it fly further. Why isn't the skin of aircraft and cars similarly dimpled? Would it compromise their structural integrity?