The secret world of swamp mud

Earlier this week, I showed you how scientists can use a simple, hand-operated tool to collect stratified core samples of mud at the bottom of a swamp. The deeper the samples go down, the older the mud is—until, eventually, you're looking at 6000-year-old muck, the remains of a lake bed that filled in with sediment [...]

Source: http://boingboing.net/2012/05/25/the-secret-world-of-swamp-mud.html

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