The endemic Siberian population had different molar features and a "very unique DNA signature" - that was dated to be almost 900, 000 years old.

BBC: Mammoths moved 'out of America'

Whatever power structure emerges, Yemen's next leaders will face daunting tasks as they inherit a state where oil revenues have declined and the economy is in ruins, where poverty is endemic and a young and rapidly growing population faces a chronic shortage of water.

CNN: Yemen after Saleh: Still a treacherous road

The Zambian barbet (aka Caplin's barbet) is the country's only endemic bird and, due to its small population and disappearing habitat, has been listed as a vulnerable species (likely to become endangered).

BBC: Birding in Zambia��s wild