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The Permafrost Tunnel is composed of fine-grained silt, ice, and soil mixed with organic material dating back 40,000 years. Inside the Permafrost Research Tunnel in Fox, Alaska.

Credit to read: Photo by Jacquelyn Hams (PolarTREC 2008), Courtesy of ARCUS

Photographer: Jacquelyn Hams
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Focal Length: 
6.3mm
File Size: 
1254217
Computed Mime: 
image/jpeg
Max Aperture: 
f/3.3
Height: 
2816
Width: 
2112
Make: 
PENTAX Corporation
Model: 
PENTAX Optio WPi
Exposure Time: 
1/4s
ISO: 
320

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