Which was Charles Darwin known for? He proposed the theory of "natural selection," which said that all living things change over time.
Charles Darwin discovered a lot in the Biology section of Science.
There were many factors that allowed the Byzantine Empire to last a 1000 years after the end of the Roman Empire which include the fact that Constantinople, the capital of the Byzantine Empire, was protected with walls that lasted almost the entire 1000 years, making Constantinople, and the center of the empire's economy/culture impervious to invaders.
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