John Leonard Riddell
American scientist (1807-1865) · United States · On the map · Scientists
John Leonard Riddell was a science lecturer, botanist, geologist, medical doctor, chemist, microscopist, numismatist, politician, and science fiction author in the United States.
John Leonard Riddell is read about 5 times a day, in 6 languages.
A typical day, 30 days to 23 August 2026
The middle day of the days counted, so one week of news cannot move it. The line under it is the last 60 days, one point a day.
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About this person
Country
United States
Category
Scientists
Type
Scientist
Status
Deceased
Dates
Lived 1807 to 1867 · aged 60
