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Killer whales (Orcinus orca) are toothed whales belonging to the oceanic dolphin family, of which it is the largest member. The most recent estimate...
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Killer whales (Orcinus orca) are toothed whales belonging to the oceanic dolphin family, of which it is the largest member. The most recent estimate...
PCBs, polychlorinated biphenyls, were once used in everything from electrical supplies and plastics to flame retardants and paints. But once it was discovered that...