-/John of Damascus major achievements?

Among his approximately 150 written works the most significant is Pēgē gnōseōs, (“The Source of Knowledge”), a synthesis of Christian philosophy and doctrine that was influential in directing the course of medieval Latin thought and that became the principal textbook of Greek Orthodox theology.

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aug 15, 2012 - although van leeuwenhoek was not the inventor of the microscope, he advanced it more he loved to grind and focus a new lens in order to see the unseen world. most of leeuwenhoek's microscopes were silver. in a simple but significant experiment (1668), he demonstrated that worms found on