Science turns super-hero as it battles to save the planet and preserve the human race.

Originator of the trend and the counter-trend, home of the Beat Generation and gay rights, San Francisco's current fascination is with living a greener, simpler life; it was here that Twitter, Wikipedia and Craigslist were founded.

A stripped-down Boeing 737 is lowered into the Pacific Ocean off the coast of Vancouver Island to create an artificial reef; the team faces fast-changing tides, inclement weather, and a difficult work site.

Bruce meets the Sakha horse people and travels to a remote encampment of Eveny reindeer herders in the Verkhoyansk Mountains, where he finds out how they are embracing the challenges of a post-Soviet Arctic.

Science turns super-hero as it battles to save the planet and preserve the human race.