- The Phanerozoic is the current and the latest of the four geologic eons in the Earth’s geologic time scale, covering the time period from 538.8 million years ago to the present. It is the eon during which abundant animal and plant life has proliferated, diversified and colonized various niches on the Earth’s surface, beginning with the Cambrian period when animals first developed hard shells that can be clearly preserved in the fossil record. The time before the Phanerozoic, collectively called the Precambrian, is now divided into the Hadean, Archaean and Proterozoic eons.
Tom Paine has almost no influence on present-day thinking in the United States because he is unknown to the average citizen. Perhaps I might say right here that this is a national loss and a deplorable lack of understanding concerning the man who first proposed and first wrote those impressive words, ’the United States of America.’ But it is hardly strange. Paine’s teachings have been debarred from schools everywhere and his views of life misrepresented until his memory is hidden in shadows, or he is looked upon as of unsound mind.
Thomas Edison, Essay in The Diary and Sundry Observations (1948) edited by Dagobert D. Runes