At the apex sits the 'keystone', a wedged-shaped stone, that firmly locks the arch into position. In our ecosystem too, 'keystone species' have a critical role in maintaining our diversity. I was recently asked to imagine that 'I', humankind were at the center of the solar system with planets orbiting around me. But civilization, industrialization and globalization have brought upon the 'nau graham' = 9 eclipse (bad omen ).

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