Ear Wax From Whales Keeps Record Of Ocean Contaminants

http://www.npr.org/2013/09/17/223139796/ear-wax-from-whales-keeps-record-of-ocean-contaminants

As disgusting as it is fascinating.

Because each layer of wax corresponds to six months of a whale’s life, by working through a plug of wax, Usenko could figure out when the animal was exposed to a particular chemical.

In this case, Usenko and his colleagues found that the whale had been exposed to worrisome pollutants throughout its lifetime.

blue-whale_wide

Image source and article: http://www.npr.org/2013/09/17/223139796/ear-wax-from-whales-keeps-record-of-ocean-contaminants

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