The Triassic–Jurassic extinction cleared ecological space for dinosaurs to become the dominant land animals of the Jurassic.
Triassic–Jurassic Extinction: Volcanoes Open the Age of Dinosaurs Read More »
The Devonian extinction shows that evolution can be reshaped not by one sudden blow, but by a long collapse in ocean health.
Oceans Lose Their Breath Read More »
The Ordovician–Silurian extinction shows how climate change can reshape evolution by collapsing old ecosystems and opening space for new life.
Ordovician–Silurian Extinction: Ice Strikes the Seas Read More »
Snowball Earth was a time when our planet may have frozen nearly from pole to pole, testing life and setting the stage for later biological change.
Snowball Earth: When Ice Reached the Equator Read More »
Before, during, and after the K–Pg extinction: a thriving Late Cretaceous world of dinosaurs, pterosaurs, birds, and flowering plants gives way to the asteroid strike and global collapse that ended the age of non-avian dinosaurs.
The K-Pg Extinction Read More »
The Permian-Triassic extinction was not just the end of many species. It was a planetary reset that destroyed the old synapsid-dominated world and opened the door for the archosaur line that would later give rise to dinosaurs.
The P-T Extinction Read More »
The Cenozoic era starts with the K–Pg extinction 66 million years ago. That event marks the sudden end of the reign of dinosaurs and the rise of mammals and birds.
Cenozoic Era: Age of Mammals & Birds Read More »
The Mesozoic era starts with the end-Permian mass extinction 252 million years ago. Dinosaurs ruled over all, including us. It ends the reign of dinosaurs with the K–Pg extinction 66 million years ago.
Mesozoic Era: Age of Dinosaurs Read More »
The start of the Paleozoic era is marked by burrowing life 538.8 million years ago. The era includes the dominant rise of our ancestors. It ends 252 million years ago with the end-Permian mass extinction, a volcanic cascade global warming event.
Paleozoic Era: The Age of Synapsids Read More »
Blue-green “algae” are not algae at all. They are cyanobacteria — ancient photosynthetic bacteria that helped oxygenate Earth and reshape the history of life.
Blue-Green Bacteria (Not Algae) Read More »
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.
Bacteria Diversify: Major modern phyla Read More »
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.
Bacterial Endosymbiosis: Origin of Eukaryotes Read More »
~2.4–2.0 BYA → Aerobic metabolism expands Oxygen-respiring bacteria diversify Major proteobacterial radiations
Bacteria Aerobic metabolism expands Read More »
About 3 billion years ago, bacteria started experimenting with photosynthesis.
Bacteria Photosynthesis begins Read More »
Shortly after LUCA, about 3.7 billion years ago, the first bacteria emerged.
First True Bacteria Read More »
About 2.4 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.
Great Oxidation Event: Third Atmosphere Read More »
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.
Touch: Life Learns to Feel Force Read More »
Prokaryotes are nucleus-free cells that include both bacteria and archaea — the two lineages that split shortly after LUCA.
