That our current ocean chemistry is shaped by life and Europa's chemistry is similar could be a datum for a Europaean biology.
Urey & Miller terrestrial biogenesis happened during the Hadean / Archean transition and their pre-biotic soup had a different chemistry than today.
James Lovelock developed the homeostatic biosphere theory that life shapes its enviroment at JPL, when hunting for Martian Methane.
From Lovelock and Margulis's Giai paper: "3.2 x 10^9 years, that life has been present on Earth, the physical and chemical conditions of most of the planetary surface have never varied from those most favourable for life" [1]
Comments
That our current ocean chemistry is shaped by life and Europa's chemistry is similar could be a datum for a Europaean biology.
Urey & Miller terrestrial biogenesis happened during the Hadean / Archean transition and their pre-biotic soup had a different chemistry than today.
James Lovelock developed the homeostatic biosphere theory that life shapes its enviroment at JPL, when hunting for Martian Methane.
From Lovelock and Margulis's Giai paper: "3.2 x 10^9 years, that life has been present on Earth, the physical and chemical conditions of most of the planetary surface have never varied from those most favourable for life" [1]
[1] http://www.jameslovelock.org/page34.html