There are four eras the earth has and is going through so far, and each era has its own time periods that I will not get into detail, otherwise it would take too long, lol.
- The first one is Precambrian era (Aproximately 4.6 billion to 541 million years ago), which is when earth was first created (presumably being just a big ball of mostly water). The time periods within that era are Archean and Proterozic.
- The second one is the Paleozoic era (Approximately 541 to 252 million years ago), which is when life began existing on earth (things like bateria, plants, and sea creatures were born/created from the chemical particles around the plants). The time periods within that era are Cambrian, Ordovician, Silurian, Devonian, Mississippian, Pennsylvanian, and Permian.
