The Earth was formed 4,500 million years ago.
Mars, Venus and Mercury were also formed at that time, but only Earth produced life. Science writer Gabrielle Walker examines new evidence that the Earth was ripe for life. Producer Roland Pease
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The Earth was formed 4,500 million years ago.
Mars, Venus and Mercury were also formed at that time, but only Earth produced life. Science writer Gabrielle Walker examines new evidence that the Earth was ripe for life. Producer Roland Pease
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