Fossil evidence of how the earliest life on Earth came to be is hard to come by. But scientists have come up with a few theories based on the microbes, viruses and prions existing today.
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Articles on Microfossils
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Microfossils offer up an array of information to scientists, like the time periods in which they lived and how environments have changed.
New research shows how rock features that look like fossilised microbes can form without life.
