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  BBC2 Horizon done an episode on the Snowball Earth subject some years back, which drew my attention to a possible climatic catastrophe in the past. I was in Dover library last week, and came across this book. I only read bits of it, but when I got home, I went onto Ebay and bought a copy. The author, Gabrielle Walker is an acknowledged science writer with a PhD from Cambridge University in Natural science. An interesting read. Check it out in the library.

  

  

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