[on unicorns]

Many creatures have gone extinct down through time. I am pretty sure that there are still zero fossilized buffaloes (just regular buffaloes, like those that roamed the American West by the millions in the early 19th Century). Yet they existed, and a few yet survive - even though we find (if I recall correctly) not a single one at all in the fossil record.

So we may not have a representative fossil for the unicorn specifically. Maybe they were hunted to extinction or their preferred food sources were destroyed by man or environmental changes. Maybe there were once millions of them, but not a single fossil at all remains. Realistic enough for you? ;-) Look at our real history of thousands of recorded years, human propensities, how rapidly the world’s climates have changed, and then ponder the once present unicorn. The puzzle pieces are there and ready to be assembled by the wise.