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RE: When narwhals (Monodon monoceros) rub their tusks together, it is believed to be to share information about the water, not as a sign of aggressive rivalry

in #science7 years ago

learning is the best thing i ever want to do...
and i must say that your posts give me new things to learn everyday :)

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I'm glad to hear that. And I agree; learning is the best activity that exist ;)