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Introduction
Reasons & Intent of this Abiogenesis Series
Abiogenesis Defined
Life's Characteristics
Early Earth Conditions
Prebiotic Chemistry Defined
Four Classes of Molecules and their Building Blocks
Car Parts: Assembly, Collection, Degradation
The Synthesis Problem
Closing Remarks: "Molecules Don't Care About Life" and What's Next
Abiogenesis Introduction
LUCA... Last Universal Common Ancestor
What is life?
Primordial soup
Miller-Urey experiment
Chemical evolution
Cell membranes
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Origin of life on Earth
Fulfilling the definition
What happened 3.5 BYA?
Chances of life
Are we alone in the universe?
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The Origin of Life.
Scientific theories are designed to explain a SPECIFIC set of facts.
So what can science tell us about the origin of life?
But life didn't have to start with modern chemicals!
So far, with naturally occurring simple fatty acids, we have a vesicle that can spontaneously grow and divide.
Covalent Bond Ligation
Monomers diffuse into a fatty acid vesicle -Monomers spontaneously polymerize and copy any template
It was their ability to spontaneously replicate, irrespective of sequence, that drove growth and division of the fatty acid vesicles.
'Use high energy molecules in the environment (near thermal vents) to recharge monomers.
No lightning striking a mud puddle...