Aristotle | Biography, Works, Quotes, Philosophy, Ethics, & Facts | Britannica
Aristotle, ancient Greek philosopher and scientist who was one of the greatest intellectual figures of Western history.| Encyclopedia Britannica
Aristotle, ancient Greek philosopher and scientist who was one of the greatest intellectual figures of Western history.| Encyclopedia Britannica
The umbra is the dark center portion of a shadow. The Moon's umbra causes total solar eclipses, and the Earth's umbra is involved in total and partial lunar eclipses.| www.timeanddate.com
