The history of Earth can be traced back 4.5 billion years to when it formed from a cloud of dust and gas. For the first billion years or so, it was a hot and inhospitable place, but eventually it cooled and life began to emerge. The earliest life forms were simple, single-celled organisms, but over time they evolved into more complex life forms. Eventually, plants and animals emerged, and then humans. The history of Earth is long and complex, but it is a fascinating story that helps us understand where we came from and how we got to where we are today.
