The history of the narwhal, the 'unicorn of the sea' with 10-foot tusks that scientists are only beginning to understand

The history of the narwhal, the 'unicorn of the sea' with 10-foot tusks that scientists are only beginning to understandA narwhal tusk was used against a terrorist in London in November. Here's the wild history of the narwhal, also known as the "unicorn of the sea."