The photo of two men standing on a mountain of bison skulls is well known as a symbol of hunting during colonisation of the US. But there's a more sinister story that lies behind it.

Scientists added a new shade to a graphical representation of global temperature change to keep up with our warming world.

In the 1970s, a small group of Greenpeace activists had a unique idea for how they could put an end to commercial whaling.

More than 50 years after it was shot, Earthrise continues to be seen as one of the most iconic environmental photographs ever taken.

Sudan, the world's last male northern white rhino, became a conservation icon in his final year of life.

In 1997 Captain Charles Moore was sailing from Hawaii to California when he noticed a steady stream of plastics bobbing in the ocean. He had discovered the Great Pacific Garbage Patch.

Five years ago a simple design – stripes of colours ranging from dark blue to dark red – started a universal and revolutionary way of communicating global warming.

For decades distressed polar bears on distant ice caps were an emblem for climate change – until experts began to doubt the effectiveness of these visuals.