Ancient river found beneath the Channel during Olympics survey

An ancient river bed that has lain unseen for 185,000 years has been uncovered by scientists mapping the parts of the English Channel in the run up to the 2012 Olympics.

The groundbreaking discovery was made during a two-year £300,000 project to map 500 square miles of seabed off the Jurassic coast in Dorset.

Using new and incredibly accurate mapping techniques, experts traced the river that may have once been used as a watering hole by woolly mammoths that roamed the area.

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