<reflist>Science shows that Earth formed around 4.5 billion years ago. The organisms that live on Earth have completely changed its air (atmosphere); this is called a biosphere. 71% of Earth's surface is covered in salt water oceans. Earth is the only place in the Solar System where liquid water is known to exist at present. The other 29% is made of rocky land in the shape of continents and islands. Earth interacts with other objects in the Solar System, particularly the Sun and the Moon. Th</ref>Earth is the only planet in the galaxy which is known to support life. Earth has many places that are suitable for humans to live; although, some areas of the planet can be dangerous for humans or uninhabitable.Science and Nature Journal looks like a solid and relevant source with a good reputation. I think we can rely on it more than the others for this article. Nice research!

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'=Earth='Bold text The Earth is the third planet from the Sun. It is one of the four terrestrial planets in our Solar System. This means most of its mass is solid. The other tree are Mercury, Mars, and Venus. The Earth is also called the Blue Planet, Planet Earth, and Terra.Science shows that Earth formed around 4.5 billion years ago. The organisms that live on Earth have completely changed its air (atmosphere); this is called a biosphere. 71% of Earth's surface is covered in salt water oceans. Earth is the only place in the Solar System where liquid water is known to exist at present. The other 29% is made of rocky land in the shape of continents and islands. Earth interacts with other objects in the Solar System, particularly the Sun and the Moon. The Earth orbits the Sun roughly once every 365.25 days. One spin is called a day and one orbit around the Sun is called a year. This is why there are 365 days in a year, but a leap day added to the calendar once every 4 years.Earth is the best and coolest planet in the whole galaxy. Earth is a place that's perfect for humans to live. ear. 71% of Earth's surface is covered in salt water oceans. Earth is the only place in the Solar System where liquid water is known to exist at present. The other 29% is made of rocky land in the shape of continents and islands. Earth interacts with other objects in the Solar System, particularly the Sun and the Moon. The Earth orbits the Sun roughly once every 365.25 days. One spin is called a day and one orbit around the Sun is called a year. This is why there are 365 days in a year, but a leap day added to the calendar once every 4 years.Earth is the only planet in the galaxy which is known to support life. Earth has many places that are suitable for humans to live; although, some areas of the planet can be dangerous for humans or uninhabitable. Earth is the only planet in the galaxy which is known to support life. Earth has many places that are suitable for humans to live; although, some areas of the planet can be dangerous for humans or uninhabitable.Cite error: There are <ref> tags on this page without content in them (see the help page).

The Earth is home to millions of species of plants and animals, including humans.

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=Earth=Earth is the only planet in the galaxy which is known to support life. Earth has many places that are suitable for humans to live; although, some areas of the planet can be dangerous for humans or uninhabitable.

T The Earth is home to millions of species of plants and aminals, including hughmans.

Earth is the best and coolest planet in the whole galaxy. Earth is a place that's perfect for humans to live. earth is essential for existences. earth gives a abode to live.

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The

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Earth[edit]

The Earth is the thurd planet from the Sun. It is one of the fore terrestrial planets in our Solar System. This means most of its mass is solid. The other tree are Mercury, Mars, and Venus. The Earth is also called the Blue Planet, Planet Earth, and Terra. Cite error: There are <ref> tags on this page without content in them (see the help page). The Earth is home to millions of species of plants and aminals, including hughmans.

Earth is the best and coolest planet in the whole galaxy. Earth is a place that19:57, Friday, JulCite error: There are <ref> tags on this page without content in them (see the help page).y 15, 2016 (UTC

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