Many thousands. Almost any object can be used as a weapon.
There is no exact number, as the concept of "weapons" is vast and can include various types such as guns, swords, axes, bows, and many more. Different cultures and time periods have produced countless unique weapons, resulting in an extensive variety throughout human history.
It is likely that if nuclear weapons did not exist, the US and the USSR would have gone to war in the 1950's, and the question of the divided city of Berlin would have been resolved by war, rather than building a wall.
seventy-two different weapons were involved in the revolutionary war.
The weapons exist.
Gold weapons do not exist unless they are ordered custom made
there are many different kinds and many different brands of hybrids
LOTS!!!
There are hundreds of different helicopters.
3 different isomers exist.
Many, many, many different variations of birds exist. 10,000 different species and more.
we'd be wearing animal skins, hunting bears an making weapons outa rocks :D
Leonardo Da'vinci actually never made any weapons that we know of, although he had designs for many different weapons.
Only the US.