French connection

Glaciers melted at the end of the ice age, and this vast quantity of water caused sea level to rise. We're worried about global warming making sea level rise a foot or two, but back then it increased by 300 feet, cutting the British Isles and Ireland off from the rest of Europe. Alan Titchmarsh visits evidence of this: a drowned forest at Bray in County Wicklow. These trees are revealed at low tide, lying where they grew and died 8,000 years ago.

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