Life on Titan
Whether there is life on Titan, the largest moon of Saturn, is at present an open question and a topic of scientific assessment and research. Titan is far colder than Earth, and its surface seems to l...
Life on Titan - Wikipedia
Hypothetical types of biochemistry
Hypothetical types of biochemistry are forms of biochemistry speculated to be scientifically viable but not proven to exist at this time. The kinds of living beings currently known on Earth all use ca...
Hypothetical types of biochemistry - Wikipedia
Shadow biosphere
A shadow biosphere is a hypothetical microbial biosphere of Earth that uses radically different biochemical and molecular processes than currently known life. Although life on Earth is relatively well...
Organoboron chemistry
Organoborane or organoboron compounds are chemical compounds that are organic derivatives of BH3, for example trialkyl boranes. Organoboron chemistry or organoborane chemistry is the chemistry of thes...
Organoboron chemistry - Wikipedia
GFAJ-1
GFAJ-1 is a strain of rod-shaped bacteria in the family Halomonadaceae. It is an extremophile. It was isolated from the hypersaline and alkaline Mono Lake in eastern California by geobiologist Felisa ...
GFAJ-1 - Wikipedia
Chrysiogenes arsenatis
Chrysiogenes arsenatis is a species of bacterium given its own phylum, called the Chrysiogenetes. It has a unique biochemistry. Instead of respiring with oxygen, it respires using the most oxidized f...
Nanobacterium
Nanobacterium (NAH-no-bak-TEER-ee-əm, pl. nanobacteria NAH-no-bak-TEER-ee-uh) is the unit or member name of a proposed class of living organisms, specifically cell-walled microorganisms with a size mu...
Organosilicon
Organosilicon compounds are organic compounds containing carbon–silicon bonds. Organosilicon chemistry is the corresponding science exploring their properties and reactivity. Most organosilicon compou...
Organosilicon - Wikipedia
Nanobe
A nanobe is a tiny filamental structure first found in some rocks and sediments. Some scientists hypothesize that nanobes are the smallest form of life, 1/10 the size of the smallest known bacteria.N...
Nanobe - Wikipedia
Carbon-based life
Carbon forms the key component for all known naturally occurring life on Earth. Complex molecules are made up of carbon bonded with other elements, especially oxygen, hydrogen and nitrogen, and carbon...
Non-cellular life
Non-cellular life is life that exists without a cellular structure. This term presumes the phylogenetic scientific classification of viruses as lifeforms, which is a controversial issue.Hypothesized a...
Non-cellular life - Wikipedia
Iron-sulfur world theory
The iron–sulfur world theory is a set of proposals for the origin of life and the early evolution of life advanced in a series of articles between 1988 and 1992 by Günter Wächtershäuser, a Munich pate...
Nucleic acid analogues
Nucleic acid analogues are compounds which are analogous (structurally similar) to naturally occurring RNA and DNA, used in medicine and in molecular biology research.Nucleic acids are chains of nucle...
Nucleic acid analogues - Wikipedia
Arsenic biochemistry
Arsenic biochemistry refers to biochemical processes that can use arsenic or its compounds, such as arsenate. Arsenic is a moderately abundant element in Earth's crust, and although many arsenic compo...
Arsenic biochemistry - Wikipedia