Talk:Lifeform

Links (2019)

1. EXTERNAL LINK: These bizarre wormlike creatures eat holes in rocks , poop out sand, and may even redesign rivers...

- Maksim-Smelchak (talk) 05:55, 21 June 2019 (EDT)

Links (2018)

1. EXTERNAL LINK: Your crew is hired to investigate why a scheduled freight run from a nearby world is overdue. Upon arriving long range scan pick up this image if the world...
2. EXTERNAL LINK: Scientists Find New Evidence That Life Could Have Begun In Space

- Maksim-Smelchak (talk) 09:28, 7 January 2018 (EST)

Links (2016)

1. EXTERNAL LINK: Why big brains are rare

- Maksim-Smelchak (talk) 08:43, 23 December 2016 (EST)

Notes (2018)

• Lifeform Terminology
  • A-life
  • Ascendant Life
  • Precursor
  • Proto-Life
  • Singularity
  • Sophontic Life
  • Transcendent Life

Notes (2017)

Correlate with Crawm's notes. After checking with Nikuur.

- Maksim-Smelchak (talk) 10:59, 4 March 2017 (EST)

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Copied from Talk:Life with the demise of the Life entry as a separate page

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Links (2019)

1. EXTERNAL LINK: Rewrite the Textbooks (Again): Origin of Mitochondria Blown Up

- Maksim-Smelchak (talk) 22:59, 19 May 2018 (EDT)

Links (2017)

1. EXTERNAL LINK: THE GENESIS PROJECT: USING ROBOTIC GENE FACTORIES TO SEED THE GALAXY WITH LIFE
2. EXTERNAL LINK: Bio Safety Levels, or BSLs.
3. EXTERNAL LINK: Folk Astrobiology

- Maksim-Smelchak (talk) 22:27, 1 August 2017 (EDT)

Notes (2019)

Overview of hypothetical types of biochemistry

Type	Synopsis	Basis	Remarks
Alternative-chirality biomolecules	Different basis of biofunction	Alternate biochemistry	Perhaps the least unusual alternative biochemistry would be one with differing chirality of its biomolecules. In known Earth-based life, amino acids are almost universally of the Template:Small form and sugars are of the Template:Small form. Molecules using Template:Small amino acids or Template:Small sugars may be possible; molecules of such a chirality, however, would be incompatible with organisms using the opposing chirality molecules.
Ammonia biochemistry	Ammonia-based life	Non-water solvents	The possible role of liquid ammonia as an alternative solvent for life is an idea that goes back at least to 1954, when J. B. S. Haldane raised the topic at a symposium about life's origin.
Arsenic biochemistry	Arsenic-based life	Alternate biochemistry	Arsenic, which is chemically similar to phosphorus, while poisonous for most life forms on Earth, is incorporated into the biochemistry of some organisms.
Borane biochemistry (Organoboron chemistry)	Boranes-based life	Alternate biochemistry	Boranes are dangerously explosive in Earth's atmosphere, but would be more stable in a reducing environment.
Dust and plasma-based biochemistry	Exotic matrix life	Nonplanetary life	In 2007, Vadim N. Tsytovich and colleagues proposed that lifelike behaviors could be exhibited by dust particles suspended in a plasma, under conditions that might exist in space.
Extremophiles	Life in variable environments	Alternate environment	It would be biochemically possible to sustain life in environments that are only periodically consistent with life as we know it.
Heteropoly acid biochemistry	Heteropoly acid-based life	Alternate biochemistry	Various metals, together with oxygen, can form very complex and thermally stable structures rivaling those of organic compounds;Template:Citation needed the heteropoly acids are one such family.
Hydrogen fluoride biochemistry	Hydrogen fluoride-based life	Non-water solvents	It has been considered as a possible solvent for life by scientists such as Peter Sneath.
Hydrogen sulfide biochemistry	Hydrogen sulfide-based life	Non-water solvents	Hydrogen sulfide is the closest chemical analog to water, but is less polar and a weaker inorganic solvent.
Methane biochemistry (Azotosome)	Methane-based life	Non-water solvents	Methane (CH4) is a simple hydrocarbon: that is, a compound of two of the most common elements in the cosmos: hydrogen and carbon. Methane life is hypothetically possible.
Non-green photosynthesizers	Alternate plant life	Other speculations	Physicists have noted that, although photosynthesis on Earth generally involves green plants, a variety of other-colored plants could also support photosynthesis, essential for most life on Earth, and that other colors might be preferred in places that receive a different mix of stellar radiation than Earth.
Shadow biosphere	A hidden life biosphere on Earth	Alternate environment	A shadow biosphere is a hypothetical microbial biosphere of Earth that uses radically different biochemical and molecular processes than currently known life.
Silicon biochemistry (Organosilicon)	Silicon-based life	Alternate biochemistry	Like carbon, silicon can create molecules that are sufficiently large to carry biological information.
Silicon dioxide biochemistry	Silicon dioxide-based life	Non-water solvents	Gerald Feinberg and Robert Shapiro have suggested that molten silicate rock could serve as a liquid medium for organisms with a chemistry based on silicon, oxygen, and other elements such as aluminium.
Sulfur biochemistry	Sulfur-based life	Alternate biochemistry	The biological use of sulfur as an alternative to carbon is purely hypothetical, especially because sulfur usually forms only linear chains rather than branched ones.

- Maksim-Smelchak (talk) 12:58, 26 July 2019 (EDT)

Notes (2016)

Theories:

• Type, Origin, Remarks, etc.