Satellite images have revealed more than 200 strange, bright blue lakes in Russia's Arctic regions that are bubbling "like jacuzzis" as a result of leaking methane gas. The lakes are a type of thermokarst lake, which form when thawing permafrost causes the surface to collapse and fill in with meltwater. But unlike normal, dark thermokarst lakes, these ones are bright blue and bubbling, because of methane that's leaking into them before escaping into the atmosphere. According to Vasily Bogoyavlensky from the Russian Academy of Sciences, these newly identified thermokarst lakes appear near oil and gas deposits on the Yamal and Gydan peninsulas in Siberia. Their bright blue colour is a result of algae that's attracted to the high sulphur levels caused by the leaking methane. Read More: ScienceAlert
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