"With the flat cells, their middle legs are scrabbling continuously, so they keep their wings moving to maintain their balance, which is a lot less energy-efficient, " Dr Glover continued.

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The nuclei of adult cells, in contrast, have settled into a quiet middle age.

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Cells of the network have been identified or suspected in countries throughout the Middle East and Africa as well as in Malaysia, the Philippines, Ecuador, Bosnia, Albania, Britain, Canada and even the United States.

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As for embryonic stem cells, Okarma said his company hopes to start the first human trials of them in the middle of next year.

FORBES