By the thirteenth century,Chinese metallurgists learned that if they heated needles to the Curie point,what could they then create?

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By heating needles to the Curie point, Chinese metallurgists were able to create a magnetic compass. This invention had a profound impact on navigation and exploration, as it allowed sailors to determine their direction even when visibility was poor or landmarks were not visible.

By the Thirteenth Century,Chinese Metallurgists Learned That If They Heated