Australian Graham Barker has been collecting his own belly button fluff every day since 1984 - keeping it in storage jars.
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Vanilla flavoring is sometimes made with an ingredient from beaver pee.
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A 4-foot walrus penis bone sold at auction in 2007 for $8,000.
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A waterfall known as The Devil's Kettle empties water into a hole and nobody knows where it ends up!
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