Bear Grylls has been debated ad nauseam on this forum and other forums around the net so why start a new round of bickering here and now that will not reveal anything that has not been said 1000's of time before...
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Earth and sky, woods and fields, lakes and rivers, the mountain and the sea, are excellent schoolmasters, and teach some of us more than we can ever learn from books.

John Lubbock