A giant meteor struck Earth 66 million years ago
Here's what wiped out dinosaurs, and 75% of all life on Earth.
Russia: new gold rush for mammoth ivory
Operation Thunderball: Thousands of wild animals seized
Beloved by Instagrammers, this lake is full of toxic waste
A green ski slope on top of a waste plant in Copenhagen
Three sea turtles released into the ocean in France
Greenpeace is trying to save endangered leatherback turtles