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Humans are often implicated in orca deaths. Now a team that looked at how orcas in the Pacific Ocean died has linked some deaths with human activity. Despite commonly being called killer whales, orcas are actually dolphins. Stephen Raverty at the British Columbia Ministry of Agriculture in Canada and colleagues examined 53 orcas that washed up from the eastern Pacific Ocean between 2004 and 2013 to determine what led to their deaths.
