The frond-like Ediacaran fauna known as Rangeomorphs had simple colony-like body plans consisting of self-similar branching patterns of tubular units.
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As scientists contemplate a new fossil from China, a shrimp-like Cambrian animal with the oldest known cardiovascular system and a "thinking" brain, would you like a prediction?
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Unexpected complexity, what did you expect? Meanwhile, the transcriptome of another "simple organism," the sea anemone, was studied by researchers. Guess what?
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