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Evolutionary cetaceans relationships among whale groups chart major prehistoric evolution cetacean animais extintos years mysticetes nost history modern natural Nost: evolutionary relationships among major groups of cetaceans "why are there so many different types of killer whales?"
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nost: Evolutionary relationships among major groups of cetaceans
Killer whale | Definition & Facts | Britannica
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"Why are there so many different types of killer whales?" - Eagle Wing