First of all, the “horn” is actually called a tusk – which makes me wonder whether or not a unicorn would have a horn or a ...

Narwhal tusks are the stuff of legends, literally. Growing up to ten feet long, they were once believed by some medieval cultures to be the horns of mythical creatures like the unicorn — not to ...

Male and female narwhals only have two teeth, which are both in the upper jaw. The male’s iconic, spiralling tusk is in fact a canine tooth. It can grow up to three metres long. Narwhal tusks were ...

Where do they go? How many are there? What's with the tusk? Narwhals (in the Arctic Ocean) have inspired myth and wonder but are still little known to science. Flip Nicklin / Minden Pictures Even ...

The most extraordinary feature of the narwhal is the long, spiral tusk which always has a left- handed spiral. No one is sure why it twists this way. The tusk, which measures up to 3m in length ...

Now an international team of researchers has discovered that a narwhal's tusk can provide valuable insight into the changing conditions in the Arctic. "Like a tree trunk, there's rings that grow ...