Thanks to radio-echo sounding (RES), researchers determined that the water consists of iron in the briny saltwater.
The iron is oxidized when it comes in contact with oxygen and takes on its blood-like color.
RES also showed that the water comes from a 300-meter-deep, 1.5 million-year-old brine lake under Taylor Glacier,.
It’s an amazing discovery, to say the least. But it’s also pioneering in the research world, because it shows that water can flow through extremely cold glaciers.
Until now, something like this was considered impossible in principle.
It’s really fascinating that this riddle got solved 106 years after the discovery, and that a 1.5 million-year-old salt lake was behind it—a cause that scientists could hardly have imagined.
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