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9 of the world's most amazing trees

By: Shea Gunther on March 11, 2010, 5:24 p.m.
quaking aspen, Pando, trembling giant

Photo: Ken Lund/flickr

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Quaking aspen: Pando

Pando, or the Trembling Giant, is a remarkable massive colony of a single quaking aspen trees spread over more than 100 acres in Utah. Every tree in the area shoots from a single organism, and they share a giant underground root system. It's estimated that Pando collectively weighs 6,615 tons, making it the heaviest living organism on the planet.