The World Around Us

Cambrian fossil Anomalocaris, a shrimp-like creature, from the Burgess Shales, Canada

Cambrian fossil Anomalocaris from the Burgess Shales, Yoho National Park, Canada. These shrimp-like creatures vary in length from 2 feet – 6ft 8in (60 cm to 2m).

Credit: Royal Ontario Museum, Toronto; photo: Keith Schengili-Roberts