The gargantuan Irfan continued to have difficulties: with his fielding, with his bowling - which despite his great height was again wicketless and largely unthreatening - and then to cap it all, with his fitness.

BBC: Century for Andrew Strauss in England win over Pakistan

In some areas, the main ice cap is surrounded by large mounds of ice, tens of miles across and up to half a mile in height.

BBC: By BBC News Online Science Editor Dr David Whitehouse