the.com/horn
the only instrument that grows on your enemy and warns you it's coming
never stopshorns grow continuously throughout an animal's entire life
bone insidea living bone core wears a permanent keratin sleeve
rhino exceptionrhino horns are pure keratin, no bone at all
car originsearly car horns were literal squeeze-bulb brass trumpets
unicorn truthnarwhal tusks fueled the medieval unicorn horn trade