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A photographer has captured amazing images of methane bubbles in Banff National Park in Alberta, Canada
The pictures show a frozen lake with the icy 'circles' trapped underneath in fascinating formations
In the summer the bubbles simply rise to the surface and pop, but in the winter they are frozen within the ice
Methane is 25 times more potent as a heat-trapping gas than carbon dioxide, and ignites easily when lit
These lakes may look like they are full of bizarre floating sea creatures, but they are actually filled with thousands of frozen bubbles.
Snapped across Banff National Park in Alberta, Canada, the natural wonders are made of highly flammable gas methane.
See more images