The history of planet Earth spans approximately 4.54 billion years, from its formation to the present day. Earth is the third planet from the Sun and is the only known planet with a biosphere, meaning it is capable of supporting life. The early history of Earth is characterized by a period of intense bombardment from space, during which time the planet was bombarded by asteroids and other celestial objects. This period, known as the Hadean Eon, lasted from the planet's formation around 4.54 bill

A fossil has been found dating life on earth back to 4.6 billion years ago. Learn about the history of life on earth in exactly 46 seconds. | HISTORY