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 tusk, should one actually exist out there. But that’s a topic for another day ...

What are the narwhals up to? Generally, we don't really know! They are mysterious creatures. NPR science correspondent Nell Greenfieldboyce talks... Narwhal sightings are rare. Scientists just saw ...

All animals have their special characteristics and features. Some are known for, or even named after, a certain feature. That’s true for many of the animals on this list. The following animals share ...