Ear Wax From Whales Keeps Record Of Ocean Contaminants : NPR »

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Layers of wax in the marine mammals' ears can be read like tree rings, scientists say, recording a whale's age and also information about pollutants in the water the whale swam through. Wax from a blue whale that washed ashore in 2007 contained surprisingly high levels of DDT. Source Main page (current trends)

More about: Blue Whale, Ear Wax, marine mammals, Ocean Contaminants

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