What has biomimicry so far brought on mysterious natural oxygen evolution?

Complete biomimicking, a quest that has motivated many of scientific communities to attempt to unravel strange aspects of biological water oxidation reaction (WOR). Achieving this utopia allows designing nature-resemble artificial leaves for the final production of oxygen with yields comparable to nature, and ultimately facile production of eco-friendly fuel i.e. molecular hydrogen. The former case, WOR, has been traditionally regarded as the...