Please be careful. When a “number of scholars” say that a one horned horse-like animal MAY be where the unicorn originated – they are NOT saying “Unicorns are real” nor are they saying “Unicorns are from the Torah”. People have a tendency to make connections and leaps in conversation that are not appropriate in Torah discussions.
If you want to get technical, saying it may be where the unicorn originated gives the impression that a unicorn is NOT real and the IDEA is what originated from this description. Surely he wouldn’t use the word originated in this context if he was implying the unicorn existed.