Russian leader Vladimir Putin has made an astonishing bid to grab a vast chunk of the Arctic, giving himself claim to its vast potential oil, gas and mineral wealth.
His audacious argument that an underwater Russian ridge is linked to the North Pole is likely to lead to an international outcry.
Some commentators have already observed it is further evidence of growing Russian assertiveness under its authoritarian president.
The Russian media trumpeted the findings of a Moscow scientific mission to the region which boasts "sensational" geological discoveries enabling the Kremlin to make the territorial claim.