Depressing news in this BBC news story that says Norwegian scientists have measured the toxicity in kiler whales and found that they now move to the top of the most toxic mammal list passing polar bears.
Norwegian scientists have found that killer whales - or orcas, as they are sometimes known - have overtaken polar bears at the head of the toxic table.
No other arctic mammals have ingested such a high concentration of hazardous man-made chemicals.
The Norwegian Polar Institute tested blubber samples taken from creatures in Tysfjord in the Norwegian Arctic.
The chemicals they found included pesticides, flame retardants and PCBs - which used to be used in many industrial processes.
Chemicals are turning the oceans into a chemical soup. The WWF called it a "chemical sink." The WWF provides a list of toxins here on its website.
