Bilim

Earth's deep memory is thawing with the Arctic permafrost, degrading records of our ancient world

Permafrost usually hits the news as a hazard, a planetary risk. When this ice-rich ground thaws, it damages roads and building foundations. It drains lakes and tips trees into drunken forests. It releases greenhouse gases that have been locked in carbon-rich soils for thousands of years, amplifying warming and driving further thaw.

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