Walking Through Time
Channel 4
Thursday 25 January 2018 02:45 - 03:40 (55 mins)
Britain used to be linked to Europe by a chalk land bridge, which was destroyed by a catastrophic flood 450,000 years ago. Dr Tori Herridge examines this once-in-a-million-years mega flood. [AD,S]
Walking Through Time may be available on playback
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