In what could be excused as a dictionary definition of futility, scientists have tried to teach a species of boxed jellyfish (Tripedalia cystophora) a few simple tricks to test whether learning necessitates a brain.
To determine whether such a rudimentary system of jellyfish-see-jellyfish-do can still learn, Bielecki and his colleagues popped adult specimens ofinto a round tank with gray striped walls to mimic the vertical bars of a distant mangrove. Seeing only its freedom, the jellyfish naturally bobbed its way into the wall without a second thought.
"It's surprising how fast these animals learn; it's about the same pace as advanced animals are doing,""Even the simplest nervous system seems to be able to do advanced learning, and this might turn out to be an extremely fundamental cellular mechanism invented at the dawn of the evolution nervous system."
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