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

What is Canada's role in solar power? We're on leading edge of fuel cell development but what about wind and solar? Most of our national wind energy output can be assessed at one glance here on eastern slopes of Rockies.

Ever wonder what babies think and do while they're waiting around to be born? Or young infants, who can't speak but still express a huge range of emotions? The Nature of Things examines the amazing powers of the fetus and infant.

The wildlife in Canada, as never seen before.

Scientists explore the extraordinary mass nesting behaviour of the Olive Ridley sea turtle, and reveal the hidden world inside a turtle nest.

David learns about rabbits and hares.

Elation and despair as cancer patients pin hopes on an experimental trial.

Studying the world's largest turtle off the coast of Nova Scotia.

A two-hour special narrated by Sandra Oh about a generation of female primatologists and their study of our closest relatives, the great apes.

Though our world is full of sound, we only notice the noise. Sound can thrill, delight, warn, and scare us. But there's much more to the story. Sound can cure the sick and make the blind see.

A filmmaker tries to unlock the mystery behind his father's cancer. Is there a connection to golf's manicured perfection?

A look at the vast season weather system that permeates and unifies India, shaping the conditions of existence for its billion-plus inhabitants.

Those affected by addiction are given hope via a revolution in research.

Filmmaker Leora Eisen sets out to discover how her twin sister could end up with life-threatening leukemia, even though they share the exact same DNA.

Every year, athletes set new world records. However, are today's top performers really better than athletes of the past?

Scientists, dreamers and billionaires are rushing to put humans on the red planet. Not just in the future, but now. Will Mars be our new home? The journey has begun.

Canada's prairies are among the world's most endangered, least protected ecosystems, but there are people working to keep them wild.

The remarkable story of a solitary wolf living against the odds, and its close bond with renowned wildlife photographer Cheryl Alexander.

Earth's first animals, 500 million years old, are just being uncovered.

Can we trust what we remember about our own lives? Memory scientists say most memories are full of distortions and errors.

A captivating exploration of the science of colour, including a look at people and animals who experience it in fascinating ways.

There's still so much we don't know about fear. Could it be good for you? What would life be like without it?

New archaeological discoveries, large-scale engineering experiments, and CGI animation to reveal new secrets about the greatest mysteries of the Egyptian Pyramids - Who built them and how?

On the remote shores of Sable Island, N.S., we meet the world's largest breeding colony of grey seals and the people who study them.