Study unlocks history of the seas

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Medieval fishermen first took to the open seas in about AD1,000 as a result of a sharp decline in large freshwater fish, scientists have suggested.

They say the decline was probably the result of rising population and pollution levels.

The study forms part of a series that examines the impact of humans on life beneath the waves throughout history.

The findings will be presented at a Census of Marine Life (CoML) conference in Canada, which begins on Tuesday.

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Vernon Clayson - 5/28/2009

Such nonsense, why is it always more people and polution, it's just as likely the people of AD 1000 took to open sea fishing because the fish were plentiful and larger, and boats had improved to allow it.