Pikaia

pikaia 1

In Depth        Pikaia has been one of the most talked about creatures discovered from the Cambrian era Burgess Shale,‭ ‬yet there is still controversy over exactly what it was.‭ ‬In‭ ‬1979‭ ‬Simon Conway Morris noted the presence of a proto-notochord,‭ ‬an anatomical structure that later creatures would develop into a spine creating the first true … Read more