Remarkable superpowers make rats the evolutionary heroes of the animal kingdom.

Is cannabis a medical cure-all or snake oil? Scientists distinguish the medicine from the myths.

How staff at a luxury hotel in Niagara Falls, NY helped ferry enslaved people to freedom.

New archaeological discoveries are challenging our understanding of when the first people arrived in North America, rewriting the human story.

Some scientists are proposing radical ways to cool our warming planet – but others say it’s time to restore nature on a global scale.

How have humans survived extreme environmental change in the past? And what will it take to survive what’s next?

Five orphaned grizzly bear cubs get a second chance at life in the wild, but can they survive without their mother? A groundbreaking study follows the bears to find out if rewilding works.

Broken genitals and cannibalism. Welcome to the weird and wonderful world of how bugs get busy.

Thirty years after historic logging protests on Vancouver Island, the battle to protect old growth forests is still raging.

Step into the world of 'friendship detectives', who are unravelling the mysteries of social behaviours in humans and other animals.

Inside the secret and rhythmic world of one of nature’s best lumberjacks.

For 44 years, David Suzuki has taken us around the world to explore science, technology, and nature – and now for something completely different. End of series.