The era that didn't have any complex life is known as the Hadean era. This era, which is the earliest division of time on the geological time scale, spans from about 4.6 billion years ago, when the Earth was formed, to about 4 billion years ago. During the Hadean era, the Earth was in its early formation stage and conditions were too harsh to support complex life. The Earth's surface was likely molten for a time and there was a lot of volcanic activity. As the Earth cooled, simple life forms such as bacteria and algae began to emerge, but complex life did not appear until much later.

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The era that didn't have any complex life is known as the Hadean era. This era, which is the earliest division of time on the geological time scale, spans from about 4.6 billion years ago, when the Earth was formed, to about 4 billion years ago. During the Hadean era, the Earth was in its early formation stage and conditions were too harsh to support complex life. The Earth's surface was likely molten for a time and there was a lot of volcanic activity. As the Earth cooled, simple life forms such as bacteria and algae began to emerge, but complex life did not appear until much later.

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The era that didn't have any complex life is known as the Hadean era. This era, which is the earliest division of time on the geological time scale, spans from about 4.6 billion years ago, when the Earth was formed, to about 4 billion years ago. During the Hadean era, the Earth was in its early formation stage and conditions were too harsh to support complex life. The Earth's surface was likely molten for a time and there was a lot of volcanic activity. As the Earth cooled, simple life forms such as bacteria and algae began to emerge, but complex life did not appear until much later.

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Which era didn't have any complex life?

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