Blue-Green Bacteria (Not Algae)
Blue-green “algae” are not algae at all. They are cyanobacteria — ancient photosynthetic bacteria that helped oxygenate Earth and reshape the history of life.
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Bacteria
Bacteria Diversify: Major modern phyla
About 1.3 billion years ago, following the “Great Oxidation Event,” the bacterial world fractured into specialized lineages, creating the foundational “Ecological Cast” that still runs our planet and our bodies today.
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Bacterial Endosymbiosis: Origin of Eukaryotes
About 2 billion years ago, bacteria are added to cells and that group leads to eukaryotes. You are a walking chimera ecosystem made of an Archaea host and trillions of Bacterial power-plants.
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Bacteria Aerobic metabolism expands
~2.4–2.0 BYA → Aerobic metabolism expands Oxygen-respiring bacteria diversify Major proteobacterial radiations
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Bacteria cyanobacteria & oxygenic photosynthesis
About 2.5 billion years ago, Cyanobacteria “hacked” the sun to split water, releasing oxygen as a byproduct and triggering the first global environmental catastrophe and subsequent biological reset.
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Bacteria Photosynthesis begins
About 3 billion years ago, bacteria started experimenting with photosynthesis.
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First True Bacteria
Shortly after LUCA, about 3.7 billion years ago, the first bacteria emerged.
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Cyanobacteria: Sun Energy as Food!
The Dawn of Photosynthesis and the Oxygenation of Earth: Around 2.4 billion years ago cyanobacteria emerged, the architects of the planet’s first photosynthetic processes. These microscopic prokaryotes harnessed the Sun’s energy, transforming it along with water and carbon dioxide into glucose and, crucially, oxygen. This period, known as the Great Oxidation Event, marked a dramatic
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Touch: Life Learns to Feel Force
About 3.72 billion years ago, right after LUCA, when cells emerged, touch became the most ancient form of biological sensing: required to physically navigate reality.
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Prokaryotic Life
Prokaryotes are nucleus-free cells that include both bacteria and archaea — the two lineages that split shortly after LUCA.