World evolution history with all facts

The Precambrian isn't just an era; it's a super-eon, representing about 88% of Earth's entire history, from its formation about 4.6 billion years ago (Ga) to the beginning of the Cambrian period roughly 541 million years ago (Ma). It's divided into three eons: Hadean, Archean, and Proterozoic.

The Mesozoic Era, often called the "Age of Reptiles," spanned three periods: the Triassic, Jurassic, and Cretaceous. It kicked off after the devastating Permian-Triassic extinction event and ended with the famous Cretaceous-Paleogene (K-Pg) extinction event. This era saw remarkable evolutionary changes, most notably the rise and fall of dinosaurs and the quiet but crucial emergence of mammals.

Here's how these events connect:

The Paleozoic Era (about 541 to 252 million years ago) is a monumental chapter in Earth's history. It's subdivided into six periods, each with its own significant biological and geological events.

Figure 1: Simplified timeline of major events and extinctions during the Paleozoic Era.

The Cenozoic Era spans from 66 million years ago (Ma) to the present day and is divided into three periods: the Paleogene, Neogene, and Quaternary. Each period saw significant changes in Earth's climate, geography, and life, culminating in the appearance and spread of modern humans.