Gene mutation helps Andean highlanders thrive at altitude, and ‘living fossil’ fish live deep underwater

Living at high altitudes for long periods can be detrimental to most people’s health — however, over thousands of years, some populations in the Andes and mountains of Tibet have adapted to the low-oxygen environments with genetic changes that allow them to thrive. 

The same adaptation can also be seen in a deep-sea-dwelling fish. 

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