These worms are pretty small ... But if you're an invertebrate crawling along the sea floor, this thing is like a nightmare just like predatory features all being pushed out of its throat at you.
The animals that came out of the Cambrian Explosion ... were like life's big first, like Big Bang in some ways. And then afterwards they didn't really persist all that long.
But a paper recently published in the journal Biology Letters by Nanglu and paleobiologist Javier Ortega-Hernandez showed examples of a new species of this Selkirkia worm in the fossil record 25 million years after researchers thought they'd vanished from the Earth.
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