One of the new specimens, known as KMN-ER 62000, has a face like the type specimen of Homo rudolfensis (the fossil that defines the species, if species it turns out to be), though it seems to be from an adolescent, whereas the type specimen is an adult.

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When there is a risk of serious or unusual infection, doctors should inform clinical microbiologists that patients are known drug users and discuss what specimens should be taken.

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These included well known naturalists such as Alfred Russel Wallace, who collected specimens in the Amazon and Malay Archipelago and independently formulated a theory of evolution by natural selection.

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Comparing it with adult specimens (the most famous of which is known as Lucy) should show the way that A. afarensis grew from childhood to adulthood, particularly the way the brain grew.

ECONOMIST: An ancient child has been discovered