The blueprint for building a human, or indeed any complex creature, lies not only in our genes but in other, neglected parts of our genome. Image: National Institutes of Health (NIH)
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Even the prettiest faces are built using junk. In mice, the shapes of the face and skull are finely tuned by junk DNA, so called because it was initially thought to lack function. The same junk DNA sequences are found in humans, so they probably shape our faces. Image: H. Morrison, MRC Human Genetics Unit, Institute of Genetics and Molecular Medicine, University of Edinburgh
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