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8102019 5 Ancient Theories on Origin of Life
httpslidepdfcomreaderfull5-ancient-theories-on-origin-of-life 18
983093 983105983150983139983145983141983150983156 983124983144983141983151983154983145983141983155 983151983150 983156983144983141 983119983154983145983143983145983150 983151983142 983116983145983142983141 983120983137983143983141 983089
Origin of Life 5 Ancient Theories of Origin of Life
by Puja Mondal -- Biology
Some of the ancient theories regarding the origin of life are as follows
Many theories have been put forward to explain the origin of life
Following ancient theories are important to mention
1 Theory of Special Creation
The greatest supporter of this theory was Father Suarez According to this theory life
was created by supernatural power According to the Bible the world was created within
six days On the first day God made the heaven and the earth on the second day He
separated the sky from the water on the third day He made the dry land and plants on
the fourth day He formed the sun the moon and the stars on the fifth day
He made the fishes and the birds and on the sixth day He formed the land animals and
human beings The first man Adam and the first woman Eve were created by God
According to Hindu mythology the world was created by God Brahma Brahma is
considered the God of creation
8102019 5 Ancient Theories on Origin of Life
httpslidepdfcomreaderfull5-ancient-theories-on-origin-of-life 28
983093 983105983150983139983145983141983150983156 983124983144983141983151983154983145983141983155 983151983150 983156983144983141 983119983154983145983143983145983150 983151983142 983116983145983142983141 983120983137983143983141 983090
He created the whole universe with his desire The first man was Manu and the first
woman was Shradha Special creation theory lacks scientific evidences on account of
which it is not accepted
2 Theory of Spontaneous Generation (Abiogenesis or Autogenesis)This theory states that life originated from nonliving things in a spontaneous manner
This concept was held by early Greek philosophers like Thales Anaximander
Xanophanes Empedocles Plato Aristotle etc In ancient Egypt it was believed that the
mud of the Nile could give rise to frogs toads snakes mice and even crocodiles when
warmed by the sun
8102019 5 Ancient Theories on Origin of Life
httpslidepdfcomreaderfull5-ancient-theories-on-origin-of-life 38
983093 983105983150983139983145983141983150983156 983124983144983141983151983154983145983141983155 983151983150 983156983144983141 983119983154983145983143983145983150 983151983142 983116983145983142983141 983120983137983143983141 983091
Van Helmont (1577-1644) held that human sweat and wheat grains could give rise to
organisms He placed a dirty shirt in a receptacle containing wheat bran and found that
after 21 days the gases from the shirt and wheat had formed living mice These beliefs
have no scientific grounds and hence are discarded
Evidences against the Theory of Spontaneous Generation The theory of spontaneous generation was disproved by many scientists of 17th 18th
and 19th centuries They proved that new organisms can be formed from pre-existing
ones ie omnis vivum ex ovo or vivo (lsquoBiogenesisrsquo of Harveymdash1651 and Т H Huxleymdash
8102019 5 Ancient Theories on Origin of Life
httpslidepdfcomreaderfull5-ancient-theories-on-origin-of-life 48
983093 983105983150983139983145983141983150983156 983124983144983141983151983154983145983141983155 983151983150 983156983144983141 983119983154983145983143983145983150 983151983142 983116983145983142983141 983120983137983143983141 983092
1870) Noted scientists who experimentally challenged the theory were Francesco Redi
(1626-1697) Lazzaro Spallanzani (1729-1799) and Louis Pasteur (1822-1895)
(i) Redirsquos Experiment
Francesco Redi an Italian physician took the flesh and cooked it so that no organisms were left alive Then he placed flesh in three jars of which one was uncovered the
second was covered with parchment and the third one was covered with fine muslin He
kept these jars for a few days and observed that maggots developed only in the
uncovered jar though the flies also visited other jars (Fig 74)
(ii) Spallanzanirsquos Experiment
Spallanzani (1765) an Italian scientist disproved the spontaneous generation of micro-
organisms He experimented that animal and vegetable broths boiled for several hours
and soon after sealed were never infested with microorganisms From this experiment
he concluded that high temperature had killed all living organisms in the broths and
without them life could not appear When the broths were left exposed to air were soon
invaded by microorganisms
(iii) Pasteurrsquos Experiment
8102019 5 Ancient Theories on Origin of Life
httpslidepdfcomreaderfull5-ancient-theories-on-origin-of-life 58
8102019 5 Ancient Theories on Origin of Life
httpslidepdfcomreaderfull5-ancient-theories-on-origin-of-life 68
983093 983105983150983139983145983141983150983156 983124983144983141983151983154983145983141983155 983151983150 983156983144983141 983119983154983145983143983145983150 983151983142 983116983145983142983141 983120983137983143983141 983094
This theory was proposed by Richter (1865) According to this theory lsquoprotoplasmrsquo
reached the earth in the form of spores or germs or other simple particles from some
unknown part of the universe with the cosmic dust and subsequently evolved into
various forms of life Helmholz (1884) speculated that lsquoprotoplasmrsquo in some form
reached the earth with falling meteorites
Arrhenius (1908 Nobel Prize Winner of 1903 in Chemistry) postulated the (=
Panspermia Theory) and stated that organisms existed throughout the universe and
their spores etc could freely travel through space from one star to the others In fact
panspermia theory is the alternative name of cosmozoic theory
Evidences against Cosmozoic Theory Living matter cannot survive the extreme cold dryness and ultra-violet radiation from
the sun required to be crossed for reaching the earth
4 Theory of Eternity of Life
8102019 5 Ancient Theories on Origin of Life
httpslidepdfcomreaderfull5-ancient-theories-on-origin-of-life 78
983093 983105983150983139983145983141983150983156 983124983144983141983151983154983145983141983155 983151983150 983156983144983141 983119983154983145983143983145983150 983151983142 983116983145983142983141 983120983137983143983141 983095
This theory was proposed by Preyer in 1880 According to this theory different types of
living beings have always existed on earth and shall continue to exist forever changing
only in form
Image Courtesy imagescatholicorgins_news2012054826heaven_6jpg
Evidence against Theory of Eternity of Life
It is accepted that earth had not always existed If life is eternal where did it exist before
this planet was formed
5 Theory of Catastrophism
Georges Cuvier (1769-1832) Father of ldquoModern Palaeontologyrdquo and Orbigney (1802-
1837) were the chief advocates of this theory According to this theory cataclysms (great
destruction) or catastrophic (concerning disastrous event) revolution occurs upon earth
from time to time which completely destroys all organisms (living beings)
8102019 5 Ancient Theories on Origin of Life
httpslidepdfcomreaderfull5-ancient-theories-on-origin-of-life 88
983093 983105983150983139983145983141983150983156 983124983144983141983151983154983145983141983155 983151983150 983156983144983141 983119983154983145983143983145983150 983151983142 983116983145983142983141 983120983137983143983141 983096
Image Courtesy blindinglightfileswordpresscom200708torndao-lightningpng
New organisms then suddenly form from inorganic matter Each creation consists oflife quite different from that of the previous one In fact this theory is merely a
modification of theory of special creation This theory is also not accepted
983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082
8102019 5 Ancient Theories on Origin of Life
httpslidepdfcomreaderfull5-ancient-theories-on-origin-of-life 28
983093 983105983150983139983145983141983150983156 983124983144983141983151983154983145983141983155 983151983150 983156983144983141 983119983154983145983143983145983150 983151983142 983116983145983142983141 983120983137983143983141 983090
He created the whole universe with his desire The first man was Manu and the first
woman was Shradha Special creation theory lacks scientific evidences on account of
which it is not accepted
2 Theory of Spontaneous Generation (Abiogenesis or Autogenesis)This theory states that life originated from nonliving things in a spontaneous manner
This concept was held by early Greek philosophers like Thales Anaximander
Xanophanes Empedocles Plato Aristotle etc In ancient Egypt it was believed that the
mud of the Nile could give rise to frogs toads snakes mice and even crocodiles when
warmed by the sun
8102019 5 Ancient Theories on Origin of Life
httpslidepdfcomreaderfull5-ancient-theories-on-origin-of-life 38
983093 983105983150983139983145983141983150983156 983124983144983141983151983154983145983141983155 983151983150 983156983144983141 983119983154983145983143983145983150 983151983142 983116983145983142983141 983120983137983143983141 983091
Van Helmont (1577-1644) held that human sweat and wheat grains could give rise to
organisms He placed a dirty shirt in a receptacle containing wheat bran and found that
after 21 days the gases from the shirt and wheat had formed living mice These beliefs
have no scientific grounds and hence are discarded
Evidences against the Theory of Spontaneous Generation The theory of spontaneous generation was disproved by many scientists of 17th 18th
and 19th centuries They proved that new organisms can be formed from pre-existing
ones ie omnis vivum ex ovo or vivo (lsquoBiogenesisrsquo of Harveymdash1651 and Т H Huxleymdash
8102019 5 Ancient Theories on Origin of Life
httpslidepdfcomreaderfull5-ancient-theories-on-origin-of-life 48
983093 983105983150983139983145983141983150983156 983124983144983141983151983154983145983141983155 983151983150 983156983144983141 983119983154983145983143983145983150 983151983142 983116983145983142983141 983120983137983143983141 983092
1870) Noted scientists who experimentally challenged the theory were Francesco Redi
(1626-1697) Lazzaro Spallanzani (1729-1799) and Louis Pasteur (1822-1895)
(i) Redirsquos Experiment
Francesco Redi an Italian physician took the flesh and cooked it so that no organisms were left alive Then he placed flesh in three jars of which one was uncovered the
second was covered with parchment and the third one was covered with fine muslin He
kept these jars for a few days and observed that maggots developed only in the
uncovered jar though the flies also visited other jars (Fig 74)
(ii) Spallanzanirsquos Experiment
Spallanzani (1765) an Italian scientist disproved the spontaneous generation of micro-
organisms He experimented that animal and vegetable broths boiled for several hours
and soon after sealed were never infested with microorganisms From this experiment
he concluded that high temperature had killed all living organisms in the broths and
without them life could not appear When the broths were left exposed to air were soon
invaded by microorganisms
(iii) Pasteurrsquos Experiment
8102019 5 Ancient Theories on Origin of Life
httpslidepdfcomreaderfull5-ancient-theories-on-origin-of-life 58
8102019 5 Ancient Theories on Origin of Life
httpslidepdfcomreaderfull5-ancient-theories-on-origin-of-life 68
983093 983105983150983139983145983141983150983156 983124983144983141983151983154983145983141983155 983151983150 983156983144983141 983119983154983145983143983145983150 983151983142 983116983145983142983141 983120983137983143983141 983094
This theory was proposed by Richter (1865) According to this theory lsquoprotoplasmrsquo
reached the earth in the form of spores or germs or other simple particles from some
unknown part of the universe with the cosmic dust and subsequently evolved into
various forms of life Helmholz (1884) speculated that lsquoprotoplasmrsquo in some form
reached the earth with falling meteorites
Arrhenius (1908 Nobel Prize Winner of 1903 in Chemistry) postulated the (=
Panspermia Theory) and stated that organisms existed throughout the universe and
their spores etc could freely travel through space from one star to the others In fact
panspermia theory is the alternative name of cosmozoic theory
Evidences against Cosmozoic Theory Living matter cannot survive the extreme cold dryness and ultra-violet radiation from
the sun required to be crossed for reaching the earth
4 Theory of Eternity of Life
8102019 5 Ancient Theories on Origin of Life
httpslidepdfcomreaderfull5-ancient-theories-on-origin-of-life 78
983093 983105983150983139983145983141983150983156 983124983144983141983151983154983145983141983155 983151983150 983156983144983141 983119983154983145983143983145983150 983151983142 983116983145983142983141 983120983137983143983141 983095
This theory was proposed by Preyer in 1880 According to this theory different types of
living beings have always existed on earth and shall continue to exist forever changing
only in form
Image Courtesy imagescatholicorgins_news2012054826heaven_6jpg
Evidence against Theory of Eternity of Life
It is accepted that earth had not always existed If life is eternal where did it exist before
this planet was formed
5 Theory of Catastrophism
Georges Cuvier (1769-1832) Father of ldquoModern Palaeontologyrdquo and Orbigney (1802-
1837) were the chief advocates of this theory According to this theory cataclysms (great
destruction) or catastrophic (concerning disastrous event) revolution occurs upon earth
from time to time which completely destroys all organisms (living beings)
8102019 5 Ancient Theories on Origin of Life
httpslidepdfcomreaderfull5-ancient-theories-on-origin-of-life 88
983093 983105983150983139983145983141983150983156 983124983144983141983151983154983145983141983155 983151983150 983156983144983141 983119983154983145983143983145983150 983151983142 983116983145983142983141 983120983137983143983141 983096
Image Courtesy blindinglightfileswordpresscom200708torndao-lightningpng
New organisms then suddenly form from inorganic matter Each creation consists oflife quite different from that of the previous one In fact this theory is merely a
modification of theory of special creation This theory is also not accepted
983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082
8102019 5 Ancient Theories on Origin of Life
httpslidepdfcomreaderfull5-ancient-theories-on-origin-of-life 38
983093 983105983150983139983145983141983150983156 983124983144983141983151983154983145983141983155 983151983150 983156983144983141 983119983154983145983143983145983150 983151983142 983116983145983142983141 983120983137983143983141 983091
Van Helmont (1577-1644) held that human sweat and wheat grains could give rise to
organisms He placed a dirty shirt in a receptacle containing wheat bran and found that
after 21 days the gases from the shirt and wheat had formed living mice These beliefs
have no scientific grounds and hence are discarded
Evidences against the Theory of Spontaneous Generation The theory of spontaneous generation was disproved by many scientists of 17th 18th
and 19th centuries They proved that new organisms can be formed from pre-existing
ones ie omnis vivum ex ovo or vivo (lsquoBiogenesisrsquo of Harveymdash1651 and Т H Huxleymdash
8102019 5 Ancient Theories on Origin of Life
httpslidepdfcomreaderfull5-ancient-theories-on-origin-of-life 48
983093 983105983150983139983145983141983150983156 983124983144983141983151983154983145983141983155 983151983150 983156983144983141 983119983154983145983143983145983150 983151983142 983116983145983142983141 983120983137983143983141 983092
1870) Noted scientists who experimentally challenged the theory were Francesco Redi
(1626-1697) Lazzaro Spallanzani (1729-1799) and Louis Pasteur (1822-1895)
(i) Redirsquos Experiment
Francesco Redi an Italian physician took the flesh and cooked it so that no organisms were left alive Then he placed flesh in three jars of which one was uncovered the
second was covered with parchment and the third one was covered with fine muslin He
kept these jars for a few days and observed that maggots developed only in the
uncovered jar though the flies also visited other jars (Fig 74)
(ii) Spallanzanirsquos Experiment
Spallanzani (1765) an Italian scientist disproved the spontaneous generation of micro-
organisms He experimented that animal and vegetable broths boiled for several hours
and soon after sealed were never infested with microorganisms From this experiment
he concluded that high temperature had killed all living organisms in the broths and
without them life could not appear When the broths were left exposed to air were soon
invaded by microorganisms
(iii) Pasteurrsquos Experiment
8102019 5 Ancient Theories on Origin of Life
httpslidepdfcomreaderfull5-ancient-theories-on-origin-of-life 58
8102019 5 Ancient Theories on Origin of Life
httpslidepdfcomreaderfull5-ancient-theories-on-origin-of-life 68
983093 983105983150983139983145983141983150983156 983124983144983141983151983154983145983141983155 983151983150 983156983144983141 983119983154983145983143983145983150 983151983142 983116983145983142983141 983120983137983143983141 983094
This theory was proposed by Richter (1865) According to this theory lsquoprotoplasmrsquo
reached the earth in the form of spores or germs or other simple particles from some
unknown part of the universe with the cosmic dust and subsequently evolved into
various forms of life Helmholz (1884) speculated that lsquoprotoplasmrsquo in some form
reached the earth with falling meteorites
Arrhenius (1908 Nobel Prize Winner of 1903 in Chemistry) postulated the (=
Panspermia Theory) and stated that organisms existed throughout the universe and
their spores etc could freely travel through space from one star to the others In fact
panspermia theory is the alternative name of cosmozoic theory
Evidences against Cosmozoic Theory Living matter cannot survive the extreme cold dryness and ultra-violet radiation from
the sun required to be crossed for reaching the earth
4 Theory of Eternity of Life
8102019 5 Ancient Theories on Origin of Life
httpslidepdfcomreaderfull5-ancient-theories-on-origin-of-life 78
983093 983105983150983139983145983141983150983156 983124983144983141983151983154983145983141983155 983151983150 983156983144983141 983119983154983145983143983145983150 983151983142 983116983145983142983141 983120983137983143983141 983095
This theory was proposed by Preyer in 1880 According to this theory different types of
living beings have always existed on earth and shall continue to exist forever changing
only in form
Image Courtesy imagescatholicorgins_news2012054826heaven_6jpg
Evidence against Theory of Eternity of Life
It is accepted that earth had not always existed If life is eternal where did it exist before
this planet was formed
5 Theory of Catastrophism
Georges Cuvier (1769-1832) Father of ldquoModern Palaeontologyrdquo and Orbigney (1802-
1837) were the chief advocates of this theory According to this theory cataclysms (great
destruction) or catastrophic (concerning disastrous event) revolution occurs upon earth
from time to time which completely destroys all organisms (living beings)
8102019 5 Ancient Theories on Origin of Life
httpslidepdfcomreaderfull5-ancient-theories-on-origin-of-life 88
983093 983105983150983139983145983141983150983156 983124983144983141983151983154983145983141983155 983151983150 983156983144983141 983119983154983145983143983145983150 983151983142 983116983145983142983141 983120983137983143983141 983096
Image Courtesy blindinglightfileswordpresscom200708torndao-lightningpng
New organisms then suddenly form from inorganic matter Each creation consists oflife quite different from that of the previous one In fact this theory is merely a
modification of theory of special creation This theory is also not accepted
983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082
8102019 5 Ancient Theories on Origin of Life
httpslidepdfcomreaderfull5-ancient-theories-on-origin-of-life 48
983093 983105983150983139983145983141983150983156 983124983144983141983151983154983145983141983155 983151983150 983156983144983141 983119983154983145983143983145983150 983151983142 983116983145983142983141 983120983137983143983141 983092
1870) Noted scientists who experimentally challenged the theory were Francesco Redi
(1626-1697) Lazzaro Spallanzani (1729-1799) and Louis Pasteur (1822-1895)
(i) Redirsquos Experiment
Francesco Redi an Italian physician took the flesh and cooked it so that no organisms were left alive Then he placed flesh in three jars of which one was uncovered the
second was covered with parchment and the third one was covered with fine muslin He
kept these jars for a few days and observed that maggots developed only in the
uncovered jar though the flies also visited other jars (Fig 74)
(ii) Spallanzanirsquos Experiment
Spallanzani (1765) an Italian scientist disproved the spontaneous generation of micro-
organisms He experimented that animal and vegetable broths boiled for several hours
and soon after sealed were never infested with microorganisms From this experiment
he concluded that high temperature had killed all living organisms in the broths and
without them life could not appear When the broths were left exposed to air were soon
invaded by microorganisms
(iii) Pasteurrsquos Experiment
8102019 5 Ancient Theories on Origin of Life
httpslidepdfcomreaderfull5-ancient-theories-on-origin-of-life 58
8102019 5 Ancient Theories on Origin of Life
httpslidepdfcomreaderfull5-ancient-theories-on-origin-of-life 68
983093 983105983150983139983145983141983150983156 983124983144983141983151983154983145983141983155 983151983150 983156983144983141 983119983154983145983143983145983150 983151983142 983116983145983142983141 983120983137983143983141 983094
This theory was proposed by Richter (1865) According to this theory lsquoprotoplasmrsquo
reached the earth in the form of spores or germs or other simple particles from some
unknown part of the universe with the cosmic dust and subsequently evolved into
various forms of life Helmholz (1884) speculated that lsquoprotoplasmrsquo in some form
reached the earth with falling meteorites
Arrhenius (1908 Nobel Prize Winner of 1903 in Chemistry) postulated the (=
Panspermia Theory) and stated that organisms existed throughout the universe and
their spores etc could freely travel through space from one star to the others In fact
panspermia theory is the alternative name of cosmozoic theory
Evidences against Cosmozoic Theory Living matter cannot survive the extreme cold dryness and ultra-violet radiation from
the sun required to be crossed for reaching the earth
4 Theory of Eternity of Life
8102019 5 Ancient Theories on Origin of Life
httpslidepdfcomreaderfull5-ancient-theories-on-origin-of-life 78
983093 983105983150983139983145983141983150983156 983124983144983141983151983154983145983141983155 983151983150 983156983144983141 983119983154983145983143983145983150 983151983142 983116983145983142983141 983120983137983143983141 983095
This theory was proposed by Preyer in 1880 According to this theory different types of
living beings have always existed on earth and shall continue to exist forever changing
only in form
Image Courtesy imagescatholicorgins_news2012054826heaven_6jpg
Evidence against Theory of Eternity of Life
It is accepted that earth had not always existed If life is eternal where did it exist before
this planet was formed
5 Theory of Catastrophism
Georges Cuvier (1769-1832) Father of ldquoModern Palaeontologyrdquo and Orbigney (1802-
1837) were the chief advocates of this theory According to this theory cataclysms (great
destruction) or catastrophic (concerning disastrous event) revolution occurs upon earth
from time to time which completely destroys all organisms (living beings)
8102019 5 Ancient Theories on Origin of Life
httpslidepdfcomreaderfull5-ancient-theories-on-origin-of-life 88
983093 983105983150983139983145983141983150983156 983124983144983141983151983154983145983141983155 983151983150 983156983144983141 983119983154983145983143983145983150 983151983142 983116983145983142983141 983120983137983143983141 983096
Image Courtesy blindinglightfileswordpresscom200708torndao-lightningpng
New organisms then suddenly form from inorganic matter Each creation consists oflife quite different from that of the previous one In fact this theory is merely a
modification of theory of special creation This theory is also not accepted
983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082
8102019 5 Ancient Theories on Origin of Life
httpslidepdfcomreaderfull5-ancient-theories-on-origin-of-life 58
8102019 5 Ancient Theories on Origin of Life
httpslidepdfcomreaderfull5-ancient-theories-on-origin-of-life 68
983093 983105983150983139983145983141983150983156 983124983144983141983151983154983145983141983155 983151983150 983156983144983141 983119983154983145983143983145983150 983151983142 983116983145983142983141 983120983137983143983141 983094
This theory was proposed by Richter (1865) According to this theory lsquoprotoplasmrsquo
reached the earth in the form of spores or germs or other simple particles from some
unknown part of the universe with the cosmic dust and subsequently evolved into
various forms of life Helmholz (1884) speculated that lsquoprotoplasmrsquo in some form
reached the earth with falling meteorites
Arrhenius (1908 Nobel Prize Winner of 1903 in Chemistry) postulated the (=
Panspermia Theory) and stated that organisms existed throughout the universe and
their spores etc could freely travel through space from one star to the others In fact
panspermia theory is the alternative name of cosmozoic theory
Evidences against Cosmozoic Theory Living matter cannot survive the extreme cold dryness and ultra-violet radiation from
the sun required to be crossed for reaching the earth
4 Theory of Eternity of Life
8102019 5 Ancient Theories on Origin of Life
httpslidepdfcomreaderfull5-ancient-theories-on-origin-of-life 78
983093 983105983150983139983145983141983150983156 983124983144983141983151983154983145983141983155 983151983150 983156983144983141 983119983154983145983143983145983150 983151983142 983116983145983142983141 983120983137983143983141 983095
This theory was proposed by Preyer in 1880 According to this theory different types of
living beings have always existed on earth and shall continue to exist forever changing
only in form
Image Courtesy imagescatholicorgins_news2012054826heaven_6jpg
Evidence against Theory of Eternity of Life
It is accepted that earth had not always existed If life is eternal where did it exist before
this planet was formed
5 Theory of Catastrophism
Georges Cuvier (1769-1832) Father of ldquoModern Palaeontologyrdquo and Orbigney (1802-
1837) were the chief advocates of this theory According to this theory cataclysms (great
destruction) or catastrophic (concerning disastrous event) revolution occurs upon earth
from time to time which completely destroys all organisms (living beings)
8102019 5 Ancient Theories on Origin of Life
httpslidepdfcomreaderfull5-ancient-theories-on-origin-of-life 88
983093 983105983150983139983145983141983150983156 983124983144983141983151983154983145983141983155 983151983150 983156983144983141 983119983154983145983143983145983150 983151983142 983116983145983142983141 983120983137983143983141 983096
Image Courtesy blindinglightfileswordpresscom200708torndao-lightningpng
New organisms then suddenly form from inorganic matter Each creation consists oflife quite different from that of the previous one In fact this theory is merely a
modification of theory of special creation This theory is also not accepted
983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082
8102019 5 Ancient Theories on Origin of Life
httpslidepdfcomreaderfull5-ancient-theories-on-origin-of-life 68
983093 983105983150983139983145983141983150983156 983124983144983141983151983154983145983141983155 983151983150 983156983144983141 983119983154983145983143983145983150 983151983142 983116983145983142983141 983120983137983143983141 983094
This theory was proposed by Richter (1865) According to this theory lsquoprotoplasmrsquo
reached the earth in the form of spores or germs or other simple particles from some
unknown part of the universe with the cosmic dust and subsequently evolved into
various forms of life Helmholz (1884) speculated that lsquoprotoplasmrsquo in some form
reached the earth with falling meteorites
Arrhenius (1908 Nobel Prize Winner of 1903 in Chemistry) postulated the (=
Panspermia Theory) and stated that organisms existed throughout the universe and
their spores etc could freely travel through space from one star to the others In fact
panspermia theory is the alternative name of cosmozoic theory
Evidences against Cosmozoic Theory Living matter cannot survive the extreme cold dryness and ultra-violet radiation from
the sun required to be crossed for reaching the earth
4 Theory of Eternity of Life
8102019 5 Ancient Theories on Origin of Life
httpslidepdfcomreaderfull5-ancient-theories-on-origin-of-life 78
983093 983105983150983139983145983141983150983156 983124983144983141983151983154983145983141983155 983151983150 983156983144983141 983119983154983145983143983145983150 983151983142 983116983145983142983141 983120983137983143983141 983095
This theory was proposed by Preyer in 1880 According to this theory different types of
living beings have always existed on earth and shall continue to exist forever changing
only in form
Image Courtesy imagescatholicorgins_news2012054826heaven_6jpg
Evidence against Theory of Eternity of Life
It is accepted that earth had not always existed If life is eternal where did it exist before
this planet was formed
5 Theory of Catastrophism
Georges Cuvier (1769-1832) Father of ldquoModern Palaeontologyrdquo and Orbigney (1802-
1837) were the chief advocates of this theory According to this theory cataclysms (great
destruction) or catastrophic (concerning disastrous event) revolution occurs upon earth
from time to time which completely destroys all organisms (living beings)
8102019 5 Ancient Theories on Origin of Life
httpslidepdfcomreaderfull5-ancient-theories-on-origin-of-life 88
983093 983105983150983139983145983141983150983156 983124983144983141983151983154983145983141983155 983151983150 983156983144983141 983119983154983145983143983145983150 983151983142 983116983145983142983141 983120983137983143983141 983096
Image Courtesy blindinglightfileswordpresscom200708torndao-lightningpng
New organisms then suddenly form from inorganic matter Each creation consists oflife quite different from that of the previous one In fact this theory is merely a
modification of theory of special creation This theory is also not accepted
983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082
8102019 5 Ancient Theories on Origin of Life
httpslidepdfcomreaderfull5-ancient-theories-on-origin-of-life 78
983093 983105983150983139983145983141983150983156 983124983144983141983151983154983145983141983155 983151983150 983156983144983141 983119983154983145983143983145983150 983151983142 983116983145983142983141 983120983137983143983141 983095
This theory was proposed by Preyer in 1880 According to this theory different types of
living beings have always existed on earth and shall continue to exist forever changing
only in form
Image Courtesy imagescatholicorgins_news2012054826heaven_6jpg
Evidence against Theory of Eternity of Life
It is accepted that earth had not always existed If life is eternal where did it exist before
this planet was formed
5 Theory of Catastrophism
Georges Cuvier (1769-1832) Father of ldquoModern Palaeontologyrdquo and Orbigney (1802-
1837) were the chief advocates of this theory According to this theory cataclysms (great
destruction) or catastrophic (concerning disastrous event) revolution occurs upon earth
from time to time which completely destroys all organisms (living beings)
8102019 5 Ancient Theories on Origin of Life
httpslidepdfcomreaderfull5-ancient-theories-on-origin-of-life 88
983093 983105983150983139983145983141983150983156 983124983144983141983151983154983145983141983155 983151983150 983156983144983141 983119983154983145983143983145983150 983151983142 983116983145983142983141 983120983137983143983141 983096
Image Courtesy blindinglightfileswordpresscom200708torndao-lightningpng
New organisms then suddenly form from inorganic matter Each creation consists oflife quite different from that of the previous one In fact this theory is merely a
modification of theory of special creation This theory is also not accepted
983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082
8102019 5 Ancient Theories on Origin of Life
httpslidepdfcomreaderfull5-ancient-theories-on-origin-of-life 88
983093 983105983150983139983145983141983150983156 983124983144983141983151983154983145983141983155 983151983150 983156983144983141 983119983154983145983143983145983150 983151983142 983116983145983142983141 983120983137983143983141 983096
Image Courtesy blindinglightfileswordpresscom200708torndao-lightningpng
New organisms then suddenly form from inorganic matter Each creation consists oflife quite different from that of the previous one In fact this theory is merely a
modification of theory of special creation This theory is also not accepted
983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082983082
