Mr Heyerdahl said that he and his five companions had felt a bit tired when they landed on a Polynesian reef after 101 days at sea, but were otherwise fit.

ECONOMIST: Thor Heyerdahl

But like the Shamu show at Sea World, the place is always jammed -- and when you think about it, the whale doesn't really do all that many tricks considering the time you waited.

CNN: April 6, 2012 -- Updated 1147 GMT (1947 HKT)

But Prof Cook said parts of the sea - and the whole canal system - froze at a time when canals were still being used to transport goods.

BBC: How different is the winter of 2010 from 1963?

If I'm on leave and it's blowing a gale I can look out at the sea and think thank goodness I'm going to be in bed tonight but when it's nice weather I can look forward to going out and doing my next ship.

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