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New research finds some baleen whale species call at such deep frequencies that they're completely undetectable by killer whales, which cannot hear sounds below 100 hertz. These also tend to be the ...

a group of killer whales capture their prey in the most extraordinary fashion. Swimming together, they create waves so powerful and accurate, they can wash a seal right off a piece of floating ice ...

Learn more about how baleen whales split into two groups — fight or flight — and how these groups determine how loud they ...