Take a 500 million-year journey back through time and discover the epic story of the vertebrates. David Attenborough has spent his career marvelling at the beauty and variety of animal life on Earth, constantly in awe of the incredible diversity of creatures that have evolved from just a handful of ancient life forms.

Now, with newly discovered fossil sites and advances in scientific research, David can piece together biological clues from animals alive today, to make the extraordinary connections that explain how the incredible range of creatures on Earth came to be.

On an eye-opening journey that combines captivating CGI graphics with groundbreaking natural history footage, David also reveals some fascinating truths about our own human biology, and uncovers some of the amazing ways that our bodies today still bare the traces of this epic evolutionary story.