Outline of life forms information

Life timeline

−4500 —

–

—

–

−4000 —

–

—

–

−3500 —

–

—

–

−3000 —

–

—

–

−2500 —

–

—

–

−2000 —

–

—

–

−1500 —

–

—

–

−1000 —

–

—

–

−500 —

–

—

–

0 —

Water

Single-celled life

Photosynthesis

Eukaryotes

Multicellular life

P
l
a
n
t
s

Arthropods Molluscs

Flowers

Dinosaurs

Mammals

Birds

Primates

H
a
d
e
a
n

A
r
c
h
e
a
n

P
r
o
t
e
r
o
z
o
i
c

P
h
a
n
e
r
o
z
o
i
c

←

Earth formed

←

Earliest water

←

LUCA

←

Earliest fossils

←

LHB meteorites

←

Earliest oxygen

←

Pongola glaciation*

←

Atmospheric oxygen

←

Huronian glaciation*

←

Sexual reproduction

←

Earliest multicellular life

←

Earliest fungi

←

Earliest plants

←

Earliest animals

←

Cryogenian ice age*

←

Ediacaran biota

←

Cambrian explosion

←

Andean glaciation*

←

Earliest tetrapods

←

Karoo ice age*

←

Earliest apes / humans

←

Quaternary ice age*

(million years ago)

*Ice Ages

The following outline is provided as an overview of and topical guide to life forms:

A life form (also spelled life-form or lifeform) is an entity that is living,^[1]^[2] such as plants (flora), animals (fauna), and fungi (funga). It is estimated that more than 99% of all species that ever existed on Earth, amounting to over five billion species,^[3] are extinct.^[4]^[5]

Earth is the only celestial body known to harbor life forms. No form of extraterrestrial life has yet been discovered.^[6]

^ "life form". World English Dictionary. Dictionary.com. 2009.
^ "life form". Online Oxford Dictionary of English. Oxford University Press. 2005. Archived from the original on 2011-08-11.
^ Kunin, W.E.; Gaston, Kevin, eds. (31 December 1996). The Biology of Rarity: Causes and consequences of rare—common differences. ISBN 978-0412633805. Retrieved 26 May 2015.
^ Stearns, Beverly Peterson; Stearns, S. C.; Stearns, Stephen C. (2000). Watching, from the Edge of Extinction. Yale University Press. p. preface x. ISBN 978-0-300-08469-6. Retrieved 30 May 2017.
^ Novacek, Michael J. (8 November 2014). "Prehistory's Brilliant Future". New York Times. Retrieved 2014-12-25.
^ "Are we alone in the universe?". NASA. March 1, 2022. Retrieved July 12, 2022.

[1] "life form". World English Dictionary. Dictionary.com. 2009.

[2] "life form". Online Oxford Dictionary of English. Oxford University Press. 2005. Archived from the original on 2011-08-11.

[Book-Biology-3] Kunin, W.E.; Gaston, Kevin, eds. (31 December 1996). The Biology of Rarity: Causes and consequences of rare—common differences. ISBN 978-0412633805. Retrieved 26 May 2015.

[StearnsStearns2000-4] Stearns, Beverly Peterson; Stearns, S. C.; Stearns, Stephen C. (2000). Watching, from the Edge of Extinction. Yale University Press. p. preface x. ISBN 978-0-300-08469-6. Retrieved 30 May 2017.

[NYT-20141108-MJN-5] Novacek, Michael J. (8 November 2014). "Prehistory's Brilliant Future". New York Times. Retrieved 2014-12-25.

[6] "Are we alone in the universe?". NASA. March 1, 2022. Retrieved July 12, 2022.

Outline of life forms information

and 29 Related for: Outline of life forms information

Outline of life forms

Outline of life

Earliest known life forms

Outline of biology

Outline of agriculture

Urmetazoan

List of life sciences

Outline of production

Outline of the humanities

Extraterrestrial life

Outline of chemical engineering

Outline of literature

Outline of industrial machinery

Outline of herbs and spices

Outline of Russia

List of forms of government

Outline of philosophy

Apicomplexan life cycle

Outline of thought

Outline of relationships

Outline of parapsychology

Outline of engineering

Outline of war

Outline of alchemy

Outline of food preparation

Outline of Earth sciences

Tree of life

Outline of theatre

Outline of applied science