<s>[INST] Is it possible that unicorns have ever existed or will ever exist? [/INST] Unicorns where believed to exist by civilizations going as far back as 2200 BC. While today there is no real evidence that unicorns exist or existed in the real world, they have existed within fiction for a long time.
This is why they are considered a type of legendary creature. The oldest occurance of a unicorn we currently know of is by the Indus Valley civilization. But they also played a part in greek natural history and in the european middle ages, were they were still believed to exist.
In the future scientists could be able to make a unicorn from a horse, but if scientists succeed in giving the horse a horn, it might not be good for the animal and opens a lot of animal wellfare and ethical questions.</s>