Imagine a big timeline that shows how things have changed over time. This timeline is divided into three big sections called "eras." Each era is kind of like a chapter in a book that has its own special story to tell.
The first era is called the "Prehistoric Era" or the "Age of Dinosaurs." This is when the world was full of big, scary creatures like T-Rex and Triceratops. People didn't exist yet, so the only things living on Earth were these giant animals, plants, and simple forms of life like bacteria. The Prehistoric Era is a very long time ago, before people were around to write things down.
The second era is called the "Historic Era" or the "Age of Civilization." This is when people started to build communities and societies, like cities and kingdoms. During this time, people made lots of important discoveries and inventions that changed the world. They learned how to write, make tools, farm the land, and even build big structures like the Pyramids in Egypt. This era is when history really started to be recorded, so there are lots of books and stories about what happened during this time.
The third era is called the "Modern Era" or the "Age of Technology." This is the time we're living in right now! During the Modern Era, people have invented amazing things like computers, airplanes, smartphones, and much more. The world has become much more connected, and we can communicate with people from all over the world in an instant. This era is about using technology to make our lives better and easier.
So, to sum it up, there are three eras: the Prehistoric Era with dinosaurs, the Historic Era with civilizations and societies, and the Modern Era with technology and innovation. Each era has its own special story to tell, and they all help us understand the world we live in today.