Powerful Legacy of Scale Trees

The vast majority of the electricity produced in human history have come from coal, which was produced from the remains of extinct organisms that have been exposed to millions of years of heat and pressure. But in the case of coal, these organisms consisted of some bizarre plants called lepidodendrales, or scale trees, which once covered Earth from Colorado to China. These powerful trees left a huge legacy, living and dying in large numbers, and forming carbon-rich peat that produced one of our most prolific energy sources. PBS Eons host Kallie Moore explains.

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