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The introduction of RNA into protocells allows for evolvability, enabling life to resist environmental constraints and evolve into more complex forms.
The continuity between geological environments and cells suggests that life forms are continuous with Earth's geochemistry, challenging the idea of a 'Frankenstein moment' where life suddenly zaps into existence.
The emergence of eukaryotes is seen as a major bottleneck in the development of complex life. Despite the vast number of planets that could potentially give rise to eukaryotes, it seems this event is incredibly rare, with Earth being a unique example.
Nick Lane explains that protocells in hydrothermal vents could self-organize and grow by deterministic chemistry, leading to early forms of heredity. This sets the stage for more complex life forms.
Despite the vast number of planets, the unique development of eukaryotes on Earth suggests that while other methods of achieving complexity might exist, they are not easily realized in nature.