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There are numerous characteristics that the Earth has but other planets do not. Some of them are

Life: The most important characteristic that the Earth possesses and other planets do not is "life". So far, its the only planet discovered by mankind to have life. Although some ufologists (people who study about life in other planets) claim that life is present in other parts of the universe, these are only hypothetical views.

Liquid Water: Liquid water till yet has been discovered only on Earth and no other planet. Although certain planets like Mars has polar zones covered with ice, yet the probability of liquid water is very less. The ice actually has never melted for years.

Atmospheric Composition: The atmospheric composition and atmospheric pressure is a major point to be noted here. The atmospheric composition of Earth with 79% Nitrogen, 21% Oxygen and very little carbon dioxide (0.04%) is just the perfect ratio for sustainance of life. Planets like Jupiter has most of the atmosphere composed of methane, hydrogen and ammonia. Other bodies like the Moon (not a planet) has no atmosphere at all because of low gravity.

There are other factors like gravity, size, colour (the Earth appears blue from space), etc are also there which differentiate it from other planets.

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12y ago

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