August 2017 cover

Finding a distinct methanogen archaeal lineage from hypersaline lakes. Image by D. Y. Sorokin; cover design by Samantha Whitham.
August 2017 cover
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A pinch of salt

Methanonatronarchaeia are a distinct class-level lineage of extremely halophilic methanogens, which lack features of classical methanogenesis and have a high intracellular concentration of potassium, suggesting potassium-based osmoprotection.

Refers to "Discovery of extremely halophilic, methyl-reducing euryarchaea provides insights into the evolutionary origin of methanogenesis" by Sorokin et al. 

Nature Microbiology 2: 17081 (2017)