@natgeo
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@natgeo Video by Reuben Wu @reuben | At Abraham Lake in Alberta, Canada, I walk across clear winter ice above layers of methane bubbles trapped beneath the surface. They're formed by the decomposing organic matter at the bottom of the lake. Each step became its own sound, the sharp crunch of spikes on ice that felt both solid and precarious. The ice here was about 12 inches (30 centimeters) thick, but that measure is no guarantee of safety. I still had to move carefully and stay alert for weaker sections that could give way without warning. For more visual stories, follow me @reuben.
