The 505-million-year-old Burgess Shale in Canada’s Yoho National Park is famed for its bizarre marine animal fossils, most of which are thought to be found…
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Burgess Shale worm provides crucial missing link
Discovery pushes fossil record back 200 million years Canada’s 505 million year-old Burgess Shale fossil beds, located in Yoho National Park, have yielded yet another…