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What are fossil biomarkers and what can they reveal about the history of life on Earth?

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Fossil biomarkers are organic molecules that are preserved in rocks or fossils. These biomarkers can provide valuable information about ancient organisms and the environmental conditions in which they lived. By studying fossil biomarkers, scientists can determine the types of organisms that existed in the past, their evolutionary relationships, and even infer aspects of their behavior and physiology. Additionally, fossil biomarkers can offer insights into past climates, environmental changes, and the overall history of life on Earth.