Even without a brain, the thick-spined brittle star moves fundamentally the same way we do.
“What brittle stars have done is throw a wrench into the works,” says Brown University evolutionary biologist Henry Ashley.
“Even though their bodies are radially symmetrical, they can define a front and basically behave as if they’re bilaterally symmetrical and reap the advantages of bilateral symmetry. For an animal that doesn’t have a central brain, they’re pretty remarkable.”
Full story at Futurity.
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