Ancient Cambrian arrow worms discovery

This video says about itself:

This ancient sea worm had a spiky mustache | Science News

23 August 2017

A newly discovered species of arrow worm that lived over half a billion years ago had about twice as many head spines as its modern kin.

Read more here.

Scientists have discovered traces of life more than half-a-billion years old that could change the way we think about how all animals evolved on earth. … The fossils found date back to a geological and evolutionary period known as the Ediacaran-Cambrian transition. This was when the Ediacaran Period, which spanned 94 million years from the end of the Cryogenian Period, 635 million years ago, moved into the Cambrian Period around 541 million years ago: here.

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