The Whole History of the Earth and Life 【Finished Edition】

This paragraph describes how the Milky Way galaxy formed over 4.5 billion years ago and later collided with a nearby dwarf galaxy. This led to increased star formation, including our solar system as part of the Milky Way. Within the solar system, particles zonally distributed based on water content. Collisions of particles led to growth of planetesimals and eventually planets like Earth. Early on, Earth collided with a Mars-sized planet, forming the moon.

This paragraph discusses how plate tectonics developed on early Earth, with oceanic plates subducting under continental plates. Weathered sediments helped neutralize the acidic oceans over time. Heavy metals settled out at mid-ocean ridges and were transported into the mantle through plate tectonics, making the oceans more habitable.

This paragraph covers how early life emerged in the caves of geological features like geysers. Natural nuclear reactors and wet-dry cycles helped synthesize biomolecules. Fatty acids encapsulated proto-life molecules and polymerization under wet-dry cycles led to more complex structures like primitive RNA that could self-replicate.

This paragraph discusses how early microbial life evolved protective mechanisms against the toxic ocean. These microbes started accumulating, influencing the ocean's composition over time. Only microbes that used the same 20 amino acids as modern life survived a mass extinction event.

This paragraph summarizes how life has coevolved with and gradually changed Earth's environment over time. Photosynthetic life produced oxygen, reducing iron in the oceans and changing its color. Continental collisions created diverse environments that accelerated evolution.

This paragraph explains how land plants like cyanobacteria increased atmospheric oxygen levels over time as continental land mass grew. This expanded habitats for further evolution. It also discusses falling sea levels from water transported into the mantle as the Earth cooled down.

This paragraph covers how eukaryotes and prokaryotes evolved symbiotically into multicellular life up to a million times bigger than earlier forms. More nutrients from expanded continents and shelfs created by falling sea levels set the stage for an explosion of new life forms.

This paragraph discusses how collisions, mass extinctions, continental rifting radiation and shifts between extreme heat and cold drove genetic mutations and hybridization between species that accelerated evolution.

This paragraph traces the evolutionary path from fish to amphibians, reptiles, dinosaurs, mammals like early primates and rodents, and eventually humans. It also covers evolutionary divergence between primates isolated on different continents.

This paragraph explains how collisions between the solar system and nebulae as well as supernova bursts and meteorite impacts caused climate changes and mass extinctions. But cosmic rays also directly mutate DNA and assist evolution.

This paragraph discusses markers in human evolutionary history like enlarged brains, fire/tool use and language. It traces early migrations out of Africa and spread across Earth. Agriculture allowed civilizations, cities and ultimately democratic societies to develop.

This paragraph positions the human era as an unstable period, enabled by abundant fossil fuels soon to run out. It suggests future crises but also rapid technological and social progress, perhaps moving beyond humans to AI.

This closing paragraph looks beyond the current human era to predict life's future spread to other galaxies. It envisions Earth's far future of joining continents, declining CO2/life, loss of water/plate tectonics, and becoming inhospitable as the Sun expands until Earth is destroyed.