Stacks of methane bubbles under ice in Abraham Lake at sunset, Alberta, Canada

size: 932765
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sha256: eee41ae361ece5415b1f006b2e81ad888f481884befcdde767908ed944a4d6fe

size: 810930
sha1: 6d868abf91f4711b5f404d9b6e404c014943f64f
sha256: 488a8b3861207d63762a9a5a2d8ea509bbdc52d8dbd6d41b13d36b8496ef61b2