Yelling, as a form of vocal expression, was not invented at a specific point in time. The word "yell" itself comes from the mid-13th century, originating as a verbal noun meaning the act or noise of shouting, crying out, or loud wails, including animal cries. The Old English root "giellan" (to call or shout) indicates that the act of yelling has existed since ancient times as a natural human and animal vocalization. Some humorous or fictional claims suggest that yelling was "invented" in 1900, but these are not factual. Actual linguistic and historical records show that yelling as a loud vocalization has existed for centuries and is deeply rooted in human and animal communication.
In summary, yelling was not invented but rather has evolved as a fundamental human and animal vocal behavior over many centuries.
