David Attenborough's First Life

David Attenborough searches for evidence of the first organisms to develop on our planet. Starting with single cells that began to stick together 600 million years ago, then moving onto the most primitive multi-celled animals, Attenborough shows examples of how these first organisms evolved in the depths of the ocean.

Attenborough explores the huge increase in diversity that occurred during the Cambrian and beyond. In this episode, Attenborough unearths evidence of early predators, investigates the rise of the arthropods, and, in the final segment, descirbes the first animals to venture onto land.