Twenty years on, relive the iconic scene from Sir David Attenborough's Planet Earth that changed our understanding of how polar bears adapt to survive.
A photographer captured this extraordinary site where whales' bodies lie in the shallows, with troubling repercussions for the deep oceans.
Wildcats are so elusive, they were thought to be extinct in parts of Europe. But they are making a comeback in some areas.
The photo shaped the world's perception of the existential threat climate change poses to low-lying island nations.
Dramatic underwater photos capture the elusive Amazonian pink dolphins red-handed.
In Namibia, a group of desert lions have left their traditional hunting grounds for the Atlantic coast and are now thriving as the world's only maritime lions.
In 1964, Jane Goodall's husband Hugo van Lawick took a photo of her and an infant chimp reaching out to each other. Decades later, it continues to impact how we view chimpanzees.
Fifty years since the release of Jaws, these photographers are showing a different, less frightening view of great white sharks.
The Cuyahoga River was so polluted it regularly went up in flames. Images of one dramatic blaze in 1952 shaped the US's nascent environmental movement, long after the flames went out.
