Existence of life on earth

Life on earth first appeared as early as 4.28 billion year ago, soon after the formation of ocean 4.41 billion year ago, and not long after the formation of earth 4.54 billion year ago. Soon after the existence of living organisms on earth, water became the basic need for every living beings. Firstly, water is the only substance on earth that is in liquid form at the room temperature commonly found on the surface of our planet. Secondly, it is a superb solvent, meaning that other substances regularly and easily dissolve into it. This allows water to carry nutrients to cells and carry waste away from them.

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