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These Boulders are Alive

Dive down to rare stromatolites—key clues to the evolution of virtually all complex life.
Topic: Planet EarthPlanet EarthNova

Program Description

Containing key clues to the evolution of virtually all complex life, stromatolites––underwater mounds of up to eight feet tall––are created by one of the oldest organisms on our planet. Over thousands of years, layers of mud and sand accumulated to build these structures, which are coated in a thin layer of bacteria. Today, growing stromatolites are extremely rare to find.