Like walruses and elephants, male narwhals (Monodon monoceros) grow tusks; these are modified teeth. In narwhals, the left tooth erupts from their head, reaching more than 8-feet-long in some ...
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Earth from space: Iconic 'Star Trek' symbol shines brightly in sea of muddy Arctic sea icewalruses (Odobenus rosmarus), polar bears (Ursus maritimus), narwhals (Monodon monoceros) and beluga whales (Delphinapterus ...
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