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Deadly historic ambush preserved in Alaskan permafrost
Frozen earth protected evidence of an attack some 400 years ago at Nunalleq, but warming temperatures threaten Alaskan sites still holding its buried history.
History at risk
Many of the artifacts recovered from the Nunalleq site are made from antler, wood, and ivory, materials that are preserved under the tundra but decay quickly after exposure.
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