tusk

Another explorer, Martin Nweeia, a dental surgeon, discovered that a narwhal’s tusk, whose purpose was a mystery to scientists, is actually a sensory rod that helps it measure salinity, temperature and water pressure.

The elephant that was given the beer is big in size, with long tusks - one in particular is distinctive as it is damaged.

Archaeologists say it was fashioned from a mammoth's tusk with an astonishing level of skill.

And they have tiny, mostly useless little eyes, no ears, and a pair of huge incisors like a mastodon's tusks.

They include figurines, tusks, sculptures of Benin's rulers, and an ivory mask.