Extended Data Fig. 5: Chaotropicity, ionic strength and water activity for a selection of samples of the Dallol area.
From: Hyperdiverse archaea near life limits at the polyextreme geothermal Dallol area

Chaotropicity was measured experimentally (see Methods) and also calculated, together with ionic strength values were from dominant Na, K, Mg, Ca, Fe chemistry data; water activity values were measured using a probe (see Methods). Known limits for life for each parameter are listed at the top of the table. Samples beyond that threshold for one or more of those parameters are shaded in grey.