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An evolutionary blast from the past
![Ancient rock strata](/research/sites/default/files/styles/ua_landscape/public/media/images/2021-11/alan-collins-.jpg?h=d4140424&itok=n7G3OfXZ)
There’s a little gap in the Earth’s history that researchers at the University of Adelaide are looking to unlock – the two billon years of the Earth’s middle age.