Earth

Introduction
Earth, The Aloha World. The planet with something we seem to be find anywhere else in The Universe, Life. No where else in The Universe have people been able to definitely say, there is complex life on that planet. We have found planet that may contain life, but we do not know for sure. For now, Earth is the planet of Life.
The Start of Earth
The Earth is 4.543 Billion Years old. Just like all Rock Worlds, Earth was formed when Gas and Dust came together due to the gravity and formed a spherical rock that revolved around The Sun. In the beginning Earth was a hot molten rock that could not support life like it does today, The Primeval Earth. Eventually however, The Earth would cool down to temperatures that are more recognizable in Today's World. 
Life on Earth
When Earth cooled down enough, life began to formed. At first simple single-celled life forms like Amebas were born. Eventually though, more complex life forms were born, like Dinosaurs and Fish and Birds and eventually Humans. Today on Earth, there are about 8.7 million species of living things on Earth. 
Earth Facts
The mass of The Earth is 5.972 X 10^24 Kilograms. The Earth is 92.96 Million miles from The Sun. 70 perfect of the Earth's surface is covered in Water. 
Conclusion
The Circle of Life on Earth is much like The Circle of Life in The Universe. Things die and things are born in its place. It's is thought that, how we live here reflects a lot of what goes on out there. We are all a part of The Universe, so this is totally normal, we are what we are a product of and as star are born, live and die, we all too do the same on Earth.