18.104.22.168 This theory sees that rocks from the planet´s surface serve and transfer vehicles for
spreading biological material from one solar system to another
22.214.171.124 Impact-expelled rocks from a planet's surface serve as
transfer vehicles for spreading biological material from one
planet to another within the same solar system.
1.1.3 Directed Panspermia
126.96.36.199 Life may have been purposely spread by an
advanced extraterrestrial civilization, or can be spread from
Earth to other planets by humans.
1.2.1 The panspermia theory was invented in the nineteenth century by
the scientists Jöns Jacob Berzelius, Lord Kelvin and Hermann von
1.2.2 The announcement of the discovery of evidence of life on
ALH84001 sparked a surge in support for the theory of
panspermia. People began to speculate about the possibility
that life originated on Mars
188.8.131.52 Tuesday, April 7, 2009, Stephen Hawking discussed the possibility of building a
human base on another planet and gave reasons why alien life might not be
contacting the human race, during his conclusion of the Origins Symposium at
Arizona State University.
1.3 Enter text here
2 Creationist theory
2.1 All life was created by the actions of God
2.2 Neo-creationism or intelilgent
2.2.1 - Earth has come about through the
actions of an intelligent Designer.
2.3 The organisms created by God can't produce new forms of organism - only God can
2.4 Forms of creationism
2.4.1 Young Earth creationism
184.108.40.206 the Earth and all forms of life were created by God in 6 days, around
10,000 years ago
2.4.2 Old Earth creationism
220.127.116.11 The universe, Earth, and life were created by processes in which God played an active part
18.104.22.168 God acts both by direct creation and by guiding the processes he created
2.4.3 Gap creationism
22.214.171.124 This theory reconciles the age of the Earth with the
story in Genesis
126.96.36.199 There were two creations - one before Adam, and a second one, which
included Adam and Eve, after a lengthy time gap
2.4.4 Day-Age creationism
188.8.131.52 There were two creations - one before Adam, and a
second one, which included Adam and Eve, after a
lengthy time gap
3 Spontaneous Theory
3.1 Spontaneous generation or anomalous generation is an obsolete body of
thought on the ordinary formation of living organisms without descent from
similar organisms. Spontaneous generation refers both to the supposed
processes in which different types of life might repeatedly emerge from
specific sources other than seeds, eggs or parents, and also to the theoretical
principles which were presented in support of any such phenomena.
3.2 Spontaneous theory versions
3.2.1 1.-The doctrine of spontaneous generation was coherently synthesized by
Aristotle, who compiled and expanded the work of prior natural philosophers and
the various ancient explanations of the appearance of organisms.
3.2.2 2.-Another version of spontaneous generation is variously termed univocal generation,
heterogenesis or xenogenesis, in which one form of life has been supposed to arise from a
different form, such as tapeworms from the bodies of their hosts.
4 Physical chemistry theory
4.1 The hypothesis of Oparin was proved by the experiment of Urey-Millerin 1953, who
produced amino acids from a mixture of chemicals and physical conditions that they
considered similar to those prevailing in the early Earth.
4.2 This theory was proposed by Alexander Oparin in 1923 because he wanted to
explain that life could come from no living substances.
5 Source:internet Topic: Spontaneous theory Date:17/8/14 Url:
5.1 Source:internet Topic: Spontaneous theory Date:17/8/14 Url:
5.1.1 Source: Internet Topic: Panspermia Theory Date:17/08/2014 Url:
184.108.40.206 Source: Internet Topic: Panspermia history Date: 16/08/2014
220.127.116.11.1 Source: Internet Topic: Creationist Theory Date: 17/08/2014 Url: