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A Random Influx of DNA from a Virus Helped Vertebrates Become So Stunningly Successful

Insertion of genetic material from a virus into the genome of a vertebrate ancestor enabled the lightning-quick electrical impulses that give animals with backbones their smarts

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Nemo and his clownfish friends might count : Short Wave : NPR

At least, that's what a group of researchers at the Okinawa Institute of Science and Technology Graduate University thinks. The team recently published a study in the journal Experimental Biology suggesting that Amphiphrion ocellaris, or clown anemonefish, may be counting. Specifically, the authors think the fish may be looking at the number of vertical white stripes on each other as well as other anemonefish as a way to identify their own species. Not only that — the researchers think that the fish are noticing the minutiae of other anemonefish's looks because of some fishy marine geopolitics. Questions, comments or thoughts on another marine sea creature you want to hear us cover? Email us at shortwave@npr.org and we might feature it on a future episode!

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