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Unformatted text preview: Where is the evidence to support this claim? Is there any data on which to base their claim? The summarized theory under Piecing It Together describes the atmosphere of early Earth as significantly different to that of today. The theory says that the atmosphere of Earth had high carbon dioxide content and almost no free oxygen. Evidence to support this theory comes from rocks of this era, which show iron carbonate content in the place of iron oxide, indicating that the atmosphere of Earth was rich in carbon dioxide and had no molecular oxygen. Scientific experiments have confirmed that Earth's early atmosphere is suitable for the spontaneous formation of carbon-based compounds such as amino acids which are the building blocks of life. Stanley Miller's pre-biotic soup experiment demonstrated that amino acids, the creators of proteins, came up spontaneously along with small organic molecules when a combination of...
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