Fall leaves United States vs. Europe: Explanation for different autumn colors on different continents.

Why Do Fall Leaves Tend to Be Red in America but Yellow in Europe?

Why Do Fall Leaves Tend to Be Red in America but Yellow in Europe?

The state of the universe.
Sept. 23 2014 1:38 PM

Why Is Fall Red in America but Yellow in Europe?

A possible explanation, 35 million years in the making.

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A perennial puzzle: Why do autumnal displays in the United States and Europe often look different? While red- and yellow-hued leaves abound in parts of America and East Asia, northern European leaves tend only to turn shades of yellow. The video above considers one explanation from a 2009 study, with Finnish and Israeli researchers reaching back 35 million years into the evolution of deciduous trees.

Paca Thomas is a regular video contributor to Slate.