They didn't. Unicorns are fictional creatures.
Chances are, unicorns existed at some point or another. Unicorns and other mythological creatures are mentioned in the bible, so perhaps they lived in the past and they evolved into something today. For example, unicorns are similar to narwhals. It was said that they evolved into narwhals in a version of Noah's Ark actually. But there is no proof that unicorns actually exist today.
Unicorns are not mythological interpretations, since they exist and live among us today. Unicorns have been around since the modern day Equus genus of horses evolved from the Pliohippusgenus, and have remained here on Earth ever since.
Unicorns were not invented. They truly exist. I've even seen one. But there are none left here today because they rapidly evolved into water mammals. Now they are called narwals.
As there is no such thing as unicorns there is no word for a group of unicorns is nathan
A group of unicorns is called a blessing of unicorns.
UNICORNS!
There aren't unicorns anywhere.
unicorns are my life . <3
No unicorns are herbivores
Unicorns are mythological.
The Unicorns ended in 2004.
Unicorns do not exist.