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Earth is the only planet which is known to harbour life.
hydrosphere and biosphere
Earth is the only planet with known life... so far.
LIFE.
Water is necessary for life to exist, and since earth is the only planet known to have liquid water, it is the living planet
Earth is the only planet that is the right temperature to support liquid water on its surface. All the others are either too hot or too cold.
planet earth is known for being the only planet to support life
Earth is the only planet known to have life and liquid water.
Earth is the only planet which is known to harbour life.
Earth
Earth is the only planet currently known to have life.
hydrosphere and biosphere
Earth is the only planet known to support life.
Because Earth is the only planet known to have life.
Earth is the only planet with known life... so far.
Earth
LIFE.