摘要
1TechnologyofnaturalmaterialsEarlymanusedconvenientlyshapedstonesastools."Workshop"areashavebeenfoundwithlargenumbersofstones,someshowingsignsofbeingworked[1].However,organicmaterialslikewoodwilldecayundernormalwetconditionsinthepresenceofoxygen,sowewon'tfindthesamesortofevidenceforwoodentools.Itissafetoassumethatearlymanusedsticksasprobesandclubs,andmaybeevenformakingsomesortofnestlikeprotectionagainsttheelementsandpredators,sinceweseechimpanzeesandotheranimalsdoingthissortofthing.Sowood,andalmostcertainlyotherplantmaterialssuchasfibrousleaves,andboneandothermaterialsgleanedfromdeadanimals,wouldbeusedfromtheearliesttimes.WeneedtoknowthisinordertoestablishtheideathatMancanbeexpectedtohavealonghistoryoftheuseandmanipulationofnaturalmaterials.Thisneedsskillsinchoosingmaterialsforcertainusesonthebasisoftheirmechanicalproperties,whetherthosepropertiesaretodowiththeeaseofshapingthematerialortheeffectivenessofthatmaterialinuse.Occasionallythematerialwaschosensimplybecauseitwasreadilyavailable.Ifwefindthataparticularmaterialwasalwaysusedforacertainjob,it'sreasonabletodeducethatManwasexertingmaterialsselectioncriteriathroughexperience.
出版日期
2005年03月13日（中国期刊网平台首次上网日期，不代表论文的发表时间）
