Africa's largest natural arch is located deep in the remote Sahara Desert, on the Ennedi Plateau in Chad, and reaching it is ...

A stunning composite image, made up of three years' worth of satellite photos, shows the ancient lava of Libya's Haruj ...

America is the world's second-largest greenhouse gas polluter - and it will no longer be part of global efforts to limit ...

The White House on Monday said that President Donald Trump would withdraw the United States from the Paris Agreement, the ...