The unicorn is a legendary creature that has been depicted through the ages as a beast with a single large, pointed, spiraling horn projecting from its forehead. Should one be fortunate enough to find them, a group of unicorns is called a “blessing”.

The mythical creatures have appeared in accounts that span from ancient Greece and Rome to medieval European folklore. Unicorns are not found in Greek mythology, but rather in accounts of natural history. Greek writers of natural history were convinced that unicorns were real, and that they lived in India (a distant and fabulous realm to them). In the 5th century BCE. Ctesias, in his book “Indika” (“On India") described them as “wild asses, fleet of foot, having a horn a cubit and a half (700 mm, 28 inches) in length, and colored white, red and black.” (His information was hearsay.)

Unicorns were believed to have several positive qualities, such as purity, justice, peace, grace, and intelligence. The horns and blood were said to have magical healing qualities; hence being a blessing.

When Marco Polo encountered what he thought was a “blessing“ on his travels in Indonesia, he described them as “very ugly brutes”,”scarcely smaller than elephants”, with a “single large black horn in the middle of the forehead”.

Not at all what he expected, but apparently a four-legged animal with a horn on its face had to be a unicorn, even if it was a disappointing specimen of the species.

Today we’d say we saw a “crush“ of Rhinos.

More Info: en.m.wikipedia.org