How have the historic levels of melanin in human populations changed due to migration?
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Historic levels of melanin in human populations have changed due to migration as people from different regions with varying levels of sunlight exposure have mixed and intermarried. This has led to a wider spectrum of skin tones and levels of melanin in different populations around the world. Migration has also caused some populations to adapt to new environments with different levels of sun exposure, leading to changes in melanin levels over time.
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