These fossil artifacts have been tentatively dated to 2.6 Billion years ago. It may seem surprising that bacteria can leave fossils at all. However, one particular group - the "blue-green algae," have left a fossil record that extends far back into the Precambrian.
Dimensions (millimeters): 45 x 30 x 25
Dimensions (inches): 1.8 x 1.2 x 1
Origins: Merzouga, Sahara Desert, Khenifra Province, Morocco, Africa
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