Greenland

The discovery comes as a battle is looming among Arctic nations for control of the North Pole

Temperatures at the ice cap almost never lift above freezing, but have now done so three times in less than a decade

Say its impact will increase power of storm surges globally, while coastal regions will be exposed to severe flooding

He got a call from Prime Minister Mette Frederiksen, who he had previously called "nasty" when she rejected his idea

We're open for business, not for sale, says Greenland's foreign ministry

It was shared after The Wall Street Journal reported the president's interest in buying the island

As global warming and to China's drive for an Arctic presence intensifies geopolitical competition

Cites pressing business in Washington as reason for cancellation

Greenland ice sheet contains enough frozen water to raise global sea levels some six metres

The experts found tiny humps, between one and 4 cm tall, in rocks at Isua in south-west Greenland