The climber who conquered the world’s toughest peaks — without extra oxygen

Steve Boyes returns to tell how he’s finding hope on the rivers of Africa

What one explorer has learned in a lifetime on the poles

To save the Amazon, an explorer studies dolphins

The secrets of a uniquely vibrant reef

Conservationists return with a message of hope

To ease thirst, she pulls water from the air

“Her Deepness” returns to discuss the future of the sea

To preserve the Andes, he’s planted millions of trees

Using tradition to make clothing sustainably

Season 4 Trailer

How protecting bats protects the planet (and us)

A promising new discovery in the Amazon

Finding life under Arctic ice

What ice might reveal about our climate future

Why the Mediterranean needs more protection

Live episode: Revolutionizing how we preserve the world underwater

A powerful new tool for protecting the ocean

Bringing ecosystems back to life

A new key to climate resilience