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jellyfish

Researcher: Stinging cells evolved by repurposing a neuron from an older form of life

Researcher: "These harpoons are made of a protein that is also found only in cnidarians, so cnidocytes seem to be one of the clearest examples of how the origin of a new gene (that encodes a unique protein) could drive the evolution of a new cell type." (It’s hard to avoid the sense of design here.) Read More ›

Jellyfish enhance their skills by building a virtual wall

Either jellyfish are smarter than we think or there is design in nature. Researchers: "The fact that these simple animals have figured out how to achieve a 'ground effect' type boost in open water, away from any solid surfaces, has the potential to open up a range of new possibilities for engineered vehicles to take advantage of this phenomenon," Gemmell said. Read More ›

Convergent eye evolution shows that evolution is “easy”?

Here’s an inventive turn of phrase from Nature: “Eye evolution came easy for simple sea creatures Family tree shows that jellies and their relatives evolved eyes independently at least eight times.” Jellyfish and their kin have no brains and make do with rudimentary nervous systems. But an analysis now shows that these simple sea creatures evolved eyes multiple times, transforming basic precursor cells into a wide range of useful visual systems. Curr. Biol. (2018), “Eye evolution came easy for simple sea creatures” at Nature Nothing like a bold approach to the problems of irreducible complexity! Imply, without stressing the point, that if the creatures were “simple,” the process must have been “easy” and therefore wthin the range of random Darwinian Read More ›