It can range from a foot long to over 4 feet long.
A bull horn.
"Let's take the bull by it's horn."
A bull horn is called a bull horn because it transmits sound to a much farther distance than simply yelling your head off would.
A bull!
Antler.
Handlebars (PLATO)
If you get stabbed by a bull's horn, you have been gored. So it is called goring.
march in the streets with a bull horn
No, don't think so.
Mutualism
Yes Chief Sitting Bull defeated general George Custer at the battle of Little Big Horn.
Bull horn bars on a bicycle can provide benefits such as improved aerodynamics, multiple hand positions for comfort, and better leverage for climbing and sprinting. These features can enhance performance and reduce strain on the hands and wrists during long rides.