An exceptionally well-preserved collection of fossils discovered in eastern Yunnan Province, China, has enabled scientists to solve a centuries-old riddle in the evolution of life on earth, revealing what the first animals to make skeletons looked like.
Washington [US], September 28 (ANI): Scientists have discovered that a well-preserved fossilized worm dating from 518 million years ago resembles the ancestor of three major groups of living animals.
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