Unnamed Documentary
Prehistoric Canada, Middle Cambrian - 520 Ma
(The scene starts with a view of a rock mountain range. There’s no plants, and no animal life.)
Narrator: The Cambrian Period is where life on earth started to bloom. Even though the surface of the earth was too hostile for life, the oceans were a perfect breeding ground for some of the most bizarre creatures the world has ever seen.
(The camera moves under water, next to coral formations, including the body of Hexacorallia. Mosura Fentoni, comes into view, swimming above the sand in the shallow shores of a beach. Trilobites at the sea floor scatter after sensing the small predator. As the Mosura chases down an Isoxys, the camera moves to focus on a lone pikaia.)
Narrator: What you are looking at is a species of early chordate known as Pikaia. Though despite its looks, this strange creature is not a plant. Very few species of plant life existed 500 million years ago. Pikaia, known as the worm fish, is possibly one of the earliest ancestors of humans today. Though the bare no visual resemblance, we can attribute many different evolutionary traits to them.