Students of human nature often assert that humans are special because they are the animal that uses language; or writes language; or uses mathematics; or uses fire; or uses tools.
Some of those have been shot down over the years.
Economists are fond of saying that humans are the animal that trades.
Joseph G. Bilby's A Revolution In Arms: The History of the First Repeating Rifles adds another one:
Some say man is a thinking animal, others that he is a risible animal, and that these attributes make him human. One could just as easily posit that man is a throwing animal - at least a projectile-oriented animal... [pg. 1]
I think he has really hit on something unique there.