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Finally , I 'd like to address a few words to all you students . At this point you can return to the picnic area via the 4WD track or continue eastwards along what is known as the Black Cockatoo Walk after the birds which excavate holes in the tree trunks hereabouts in search of moth larvae . But contrary , perhaps , to the expectation and , certainly , to the widely held view that science must have been in the forefront of temporal innovation , the mechanical measurement of time turns out to have played a minimal role in science until the scientific revolution of the seventeenth century and the invention of more precise clocks in the eighteenth . The history of ancient societies covers several centuries ( from the eight century , BC , to the fourth century , AD ) ; the comprehension of these societies requires multiple skills , from epigraphy to philosophy , from numismatics to the history of science . The Office may , to the extent permitted by law and the provisions of this Order , enter into such grant agreements and contracts and take such other actions as may be necessary to implement the program effectively . Their concentration on the archaic and classical periods , to the exclusion of the prehistorical and Hellenistic , also gives a sharp focus . The problems of mounting such a study are discussed and the focus changes from those who were helped , to the helpers .