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Alaska’s rivers are turning rust-orange and scientists say the cause has been frozen for thousands of years
On a late-summer flight over northern Alaska’s Brooks Range, stretches of river that should look like glass suddenly appear stained the colour of iron oxide. From above, they resemble rust spreading ...
Permafrost is often described as frozen soil, but that undersells its role. It is more like a long-term storage vault for minerals, organic material, and sulfide-rich rocks. When it stays frozen, ...
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