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 • Image Gallery
The Earth is about 4.5 billion years old. Life first evolved and flourished during the time known as the Precambrian—the first four billion years of the planet’s history. That means that 90% of Earth’s history took place during the Precambrian.
Scientists learn about what life was like during the Precambrian through a number of specimens and fossils.
Continue to Life’s Origin Images. >>
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