In 1967, a major breakthrough was made in our understanding of the evolution of the world. A student discovered fossils at Mistaken Point in Newfoundland, Canada.
The fossils give us a record of the oldest multi-cellular organisms to inhabit the earth.
Catherine Harvey has been speaking to Dr Shiva Balak Misra about his ground-breaking find.
A Made in Manchester production for BBC World Service.
(Photo: Image of Newfoundland's shores. Credit: Getty Images)