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- Uhm give me a minute haha. In the late 1700’s, Lazzaro Spallanzani likewise tried to disapprove the Spontaneous generation theory by performing a controlled experiment with broth.
- He constructed his own experiment by placing broth in each of two separate bottles, boiling the broth in both bottles, then sealing one bottle and leaving the other open.
- Spallanzani concluded that while one hour of boiling would sterilize the soup, only a few minutes of boiling was not enough to kill any bacteria initially present, and the microorganisms in the flasks of spoiled soup had entered from the air.
- Then, what happened?
- Yeah. But wait, have you heard about the theory of Alexander I oparin?
- So many theory that opposing Aristotle's experiment huh.
- his name sounds familiar to me. Is he the one who believed that life developed from coacervates?
- exactly! He's the one who explained that the energy of lightning and ultraviolet rays from the sun caused these gases to combine and form chemical compounds.
- As they mixed with rain and hot seas, they formed complex organic molecules which were similar to what living things are made.
- So was saying that life on Earth developed through gradual chemical changes of organic molecules?
- Yes. in the "primordial soup" which likely existed on Earth four billion years ago.
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