Weird History

Historical Shower Thoughts That Made Us Say Whoa

List Rules
Vote up the random historical musings that make you say whoa.

Most of us are accustomed to the widely discussed "shower thoughts," or thoughts we have while our minds are not otherwise preoccupied with daily tasks. For some of use, those thoughts lead to contemplating the vast questions of our history here on Earth and beyond. 

Have you ever considered how long sharks have been around; or how much we actually do not know about the generations that came before us? Historical shower thoughts leave us pondering the existential questions we would otherwise be too disposed to ask.