Now, if I wanted to be one of those ponderous scientific people, and “let on” to prove what had occurred in the remote past by what had occurred in a given time in the recent past, or what will occur in the far future by what has occurred in the late years, what an opportunity is here! Geology never had such a chance, nor such exact data to argue from! Nor “development of species” either! Glacial epochs are great things, but they are vague—vague—vague. Please observe:--
In the space of one hundred and seventy-six years the
Mark Twain, from "Life on the Mississippi".