Earth

In Turkmenistan, this crater has been burning non-stop since 1971

#TBT: The Great Emu War

These fascinating snowy formations could disappear

The close relationship between fungi and trees

This French hiking trail is one of the longest in Europe

Why the dodo went extinct

The Nā Pali coast offers breathtaking landscapes

The wolverine is the most ferocious animal of the Far North

How do frigatebirds find their mates?

Why chilies are hot

Sister Act: California's 'weed nuns'

The serval is the second-fastest cat after the cheetah