** Images of the Arctic ice shelf cracking up are an icon of the damage wrought by global warming.
But a team of researchers from the Universite Laval in Canada have found evidence that one ice shelf might have broken up before, 1,400 years ago – long before industrialisation had any impact on the planet.
A study of sedimentary material on the bottom of Disraeli Fjord in Canada, found evidence of what the team described as a 'major fracturing event' 1,400 years ago.
