Watch The Nature of Things, Best of

David Suzuki hikes, paddles and skis to find the experts with the answers as we explore the consequences of global warming across Canada. We'll find out how, or even if, we can adjust to a quickly changing world before it's too late.

Prominent conservationists discuss key events in the evolving history of conservation in Kenya and what it will take for conservation to succeed today. This documentary takes a look at the Maasai tribe in Africa and how colonial and contemporary conservation initiatives have impacted them.

An exploration of the ongoing quest to extend human life, the cutting-edge research and the latest discoveries.

Build Green will turn the construction industry on its head. Who can forget the lesson of the "Three Little Pigs?" Build Green reveals the opposite is true - straw is good, bricks are bad. Viewers will discover that when it comes to raw power, nothing can beat the sun, wind and rain, not to mention dirt, straw and sewage. Even David Suzuki, the original "Mr. Green," has a thing or two to learn. Hit the dirt road with him as he travels to the heart of "green-land" (B.C.'s Salt Spring Island) to visit Randy Bachman's ultra-cool, super-ecological abode.

Stephen Lewis, the former United Nations HIV/AIDS Envoy to Africa looks back as he steps down from his post on the front lines, and at his fight against the pandemic.

A look at the country's hugely successful experiment in sustainable development. Cuba's latest revolution - a green one - is having repercussions worldwide. Will it continue?

A pre-eminent bee behaviourist links up with an artist who sculpts with bees to unravel the secrets of bee communication, and by extension, all communication. The latest in micro camera equipment allows us to go deep inside the hive.

Delving into the challenging field of heart transplant. The dramatic and intimate stories of heart patients confined to the transplant ward at Toronto General Hospital and the doctor, one of Canada's leading heart physicians, and her team who makes life and death decisions that will inevitably change these patients' lives forever.

Filmmaker Bill Lishman documents his journey around the globe in search of earth's renewable energy.