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A. He estimated the circumference of Earth.
Explanation:
Eratosthenes' most famous contribution to science was his calculation of the circumference of the Earth, which he completed while working on the second volume of his "Geography."
Know more about the numerous contributions of Archimedes through his 10 major achievements. One of the most famous contributions of Archimedes is the Archimedes’ principle. It is said to have been found by him when he was tasked to determine the purity of the gold crown of King Hiero II of Syracuse
Greater corporate consolidation was the strongest business trend in the United States during the late 19th century.
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3.The relatively stable international environment has created a favorable international environment for the development of the world economy and the progress of the scientific and technological revolution, and to a certain extent promoted the emergence of the economic multipolar pattern and economic
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Answer:
In the years c1250-c1500 hospitals simply offered care and treatment for minor illnesses based on treatments such as herbal remedies; in the years c1700-c1900 hospitals attempted to treat a wider range of illnesses and included surgical operations.
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