Questions tagged [identify-this-object]

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1answer
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What is this long mark undersea

Visiting Google Maps, I came across this long, sinuous, while pretty regular mark undersea that looks like an ancient river, when the sea was way lower, or a big (big!) boulder that could have rolled ...
3
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1answer
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What instrumentation and/or measurement is likely being shown in this video of giant Siberian craters/sinkholes?

The RT video The Permafrost Mystery: scientists explore giant Yamal Sinkhole (with English subtitles) shows scientists exploring the formation. In one scene after about ...