Most cultures had written tablets, writings, papers, etc that had dates and those were kept somewhere safe so we have it now and authors write them in textbooks that historians read
Aside from the milestones, Louis Armstrong achieved as a jazz soloist which made him the most influential musician in the music's history, his success can be mainly attributed to the "engaging" personality he has. He was idolised by his jazz fans mainly because he wants to be seen as more of an entertainer.
Enviromental Protection Agency or EPA
Global warming is the worst for sure it’s killing more the just one person