Hydropower accounts for roughly half of the renewable energy generated in Maine. What will happen as dams disappear?

Its mission was to map Earth's gravitational field. GOCE did this for four years ... It disintegrated about 50 miles above ...

Despite being over 4,000 miles away from both the European countries it belongs to, this tiny island has been split in half, with a border in the middle.

Like most of West Africa, English-speaking Sierra Leone is a gaping hole on the holiday map – but a new tourism strategy could change that ...