Supply the appropriate word/words to complete the following passages:
Human civilisations have been around (a) ............. a paltry 12,000 years, barely a (b) ............. seconds (c) ............. the geological clock. In that short amount (d) ............. time, we’ve managed (e) ............. create quite a ruckus, etching our dominance (f) ............. nature with our villages, towns, cities and megacities. Early human civilizations prospered (g) ............. Egypt, Greece, China (h) ............. India.