Researchers have found what may be the earliest evidence of multicellular life on Earth. Large fossils uncovered in 2.1 billion-year-old rock from Gabon, in western Africa, appear to be incipient examples of macroscopic life in what was then a sea of single-celled microbes.
Scientists believe that multicellular life really took off much later, in the great expansion of animal body plans known as the Cambrian explosion 545 million years ago.
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