List of life forms

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This article is about a thing that is living or alive. For The Future Sound of London album, see Lifeforms (album). For other uses, see Lifeform (disambiguation).

A life form or lifeform is an entity or being that is living or alive or living.[1][2] This is a list of articles that relate to physical, hypothetical, alleged, religious, or fictional life forms.

Although more than 99 percent of all species that ever lived on the planet are estimated to be extinct,[3][4] there are currently 10–14 million species of life on the Earth.[5]

In process philosophy, objects in the world or universe are layered or tiered in complexity.[6] Living things are difficult to define,[7] but life forms can be considered to be the most complex entities in the arena or environment in which they exist.[8] As in process philosophy, this article brings together in a holistic manner, life forms from the diverse human intuitions found in experiences that include the ethical, religious, philosophical, scientific, and aesthetic.[9]

Scientific, evolutionary categories[edit]




Organisms whose cells contain complex structures enclosed within membranes

Scientific, not evolutionary categories[edit]

Hypothetical life[edit]


Artificial and engineered[edit]

Origin of the universe and life[edit]

  • Abiogenesis, the transition from nonliving elements to living systems
  • Cosmogony, any theory concerning the origin of the universe
  • Cosmology, the study of the universe and humanity's place in it
  • Creation myth, a mytho-religious story or explanation that describes the beginnings of humanity, Earth, life, and the universe
  • Genesis creation narrative, creation as described in the first two chapters of the Book of Genesis in the Bible
  • Molecular evolution, evolution at the scale of molecules

Encounters with animate beings subject to skepticism[edit]

Animate beings subject to skepticism[edit]

Folklore, legendary, and mythological[edit]

Religious, spiritual, occult, and philosophical[edit]


Qualities, attributes, and terms[edit]


See also[edit]


  1. ^ "life form". World English Dictionary. 2009. 
  2. ^ "life form". Online Oxford Dictionary of English. Oxford University Press. 2005. 
  3. ^ Stearns, Beverly Peterson; Stearns, S. C.; Stearns, Stephen C. (2000). Watching, from the Edge of Extinction. Yale University Press. p. 1921. ISBN 978-0-300-08469-6. Retrieved 27 December 2014. 
  4. ^ Novacek, Michael J. (8 November 2014). "Prehistory’s Brilliant Future". New York Times. Retrieved 25 December 2014. 
  5. ^ G. Miller; Scott Spoolman (2012). Environmental Science - Biodiversity Is a Crucial Part of the Earth's Natural Capital. Cengage Learning. p. 62. ISBN 1-133-70787-4. Retrieved 27 December 2014. 
  6. ^ Jeremy R. Hustwit (2007). "Process Philosophy". Internet Encyclopedia of Philosophy. p. 3.d. Rejection of Nominalism. 
  7. ^ Mark A. Bedau (1998). "Four Puzzles about Life". Reed College. 
  8. ^ Harinder S. Sandhu (2010). "Scientific - Origin of the Universe". 
  9. ^ Jeremy R. Hustwit (2007). "Process Philosophy". Internet Encyclopedia of Philosophy. p. 2.a. In Pursuit of a Holistic Worldview.