A new study by researchers from The Johns Hopkins University and The National Aquarium shows that wild dolphins have higher levels of mercury than their captive cousins, suggesting that mercury pollution in the oceans is a continuing problem.
The captive animals were fed a controlled diet, while the wild mammals dined on marine life that may carry more of the toxic metal.
To read the full, original article click on this link: Oceans: Study tests dolphins for mercury exposure « Summit County Citizens Voice
