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Period: 900 BCE to May 7, 1489
Creationism Theory
It states that everything on Earth was created by God in the way it already is, so life has not passed through significant change. This idea is found in the ancient scriptures of almost every religion, so is a very antique idea. It had a lot of power during the Middle Ages. The theory is based on religion. -
May 6, 1000
Spontaneous Generation
Living organisms could arise suddenly from any kind of non-living matter. The first person that proposed it was a Greek philosopher named Anaximander. The idea was supported by Aristoteles. It was proposed on 590 B.C. -
Nov 7, 1400
Creationism Theory
It states that everything on Earth was created by God in the way it already is, so life has not passed through significant change. This idea is found in the ancient scriptures of almost every religion, so is a very antique idea. It had a lot of power during the Middle Ages. The theory is based on religion. It's the oldest theory of origin of life. -
First evolutionism theory
Jean Baptiste Lamarck proposed that life took its form through natural processes. Instead of miraculously, it was rejected by the church. -
Catastrophism
It is a modification of the creationism. It states that there was several creations by God, a catastrophe preceding each creation caused by some kind of geological disturbance. It was proposed by Georges Cuvier -
Biogenesis
States that living things can only arise from living things and can't be spontaneously generated. This was proposed by Rudolf Virchow a German doctor and pathologist. -
Darwin-Wallace
Charles Darwin and Alfred Wallace presented the theory of evolution by natural selection. -
Panspermia
Life reached this planet from other heavenly bodies such as meteorites. It came in the form of "seeds" or highly resistant spores of some organisms. This theory was proposed by Richter -
Physical-Chemical Theory
This theory stated that life on Earth was a result of a slow and gradual chemical process that occurred more than 3 billion years ago. The primitive atmosphere and nature conditions converted chemical sources into a biological cell by forming aminoacids.
It was proposed by A.I. Oparin, a Russian scientists and an English one named J.B.S Haldane. -
Endosymbiotic Theory
It describes how a host cell and ingested bacteria could survive alone but over evolution they became dependent on one another for survival. So they started to form more specialized cells. Lynn Margulis published her theory in 1970.
