Giraffes numbers have been plummeting
Unlike elephants and polar bears, they have gone under the radar. Here is why giraffes are facing a "silent extinction".
Why the dung beetle is rolling this ball
How this river in the U.S. inspired an environmental movement
The special forces veterans turned coral reef protectors
This is an environmental success story
Thwaites Glacier's disappearance will have a tragic impact
How blue-footed boobies attract mates