Comments on: Podrock: Pareidolia, or Possibly Petrified Protozoans? https://habitablezone.com/2016/02/08/podrock-pareidolia-or-possibly-petrified-protozoans/ Fri, 03 Apr 2026 18:20:54 -0700 hourly 1 http://wordpress.org/?v=3.3.1 By: podrock https://habitablezone.com/2016/02/08/podrock-pareidolia-or-possibly-petrified-protozoans/#comment-35542 podrock Tue, 09 Feb 2016 01:15:48 +0000 https://www.habitablezone.com/?p=55607#comment-35542 Every hydrothermal deposit on earth, for pretty much the last 3 billion years, has life as part of the environment. Therefore, every earth analog is contaminated by life. We do not have a example that we can assume is life-free. Mars is the other way 'round. Since there is, to date, no evidence for life there, it makes sense to start with the model of non-biologic processes to develop the features we see on mars. Maybe this will help us separate organic forms from inorganic ones. This morphology of sinter as evidence of life? Unconvincing. Every hydrothermal deposit on earth, for pretty much the last 3 billion years, has life as part of the environment. Therefore, every earth analog is contaminated by life. We do not have a example that we can assume is life-free.

Mars is the other way ’round. Since there is, to date, no evidence for life there, it makes sense to start with the model of non-biologic processes to develop the features we see on mars.

Maybe this will help us separate organic forms from inorganic ones.

This morphology of sinter as evidence of life? Unconvincing.

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