From the genome of a mystery-animal’s skull found in West Greenland in 1990, scientists have identified the creature as the male offspring of a female narwhal and male beluga, they reported yesterday ...

Since he was a child, Martin Nweeia, DMD (DEN ’84), has been fascinated with teeth—from the human variety to the 9-foot spear-shaped tusk that grows out of the head of the narwhal, an Arctic whale.

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T he narwhal (Monodon monoceros), an iconic whale of remote Arctic waters, is widely known for its long, spiral tusk, which ...