Ka taƙaita labarin:  Masana sun dade suna tunanin cewa ana amfani da kayan aikin prehistoric don taimakawa mafarautan farko su kashe da yanka dabbobi amma shaidar da za ta goyi bayan wadannan da'awar ta kasance babu ita - har zuwa yanzu. Masu bincike da ke nazarin ragowar giwa a Isra'ila sun gano alamun ragowar dabbobi a kan kayan aiki na farko da ake kira 'handax da scrapers' tare da alamun yankewa a cikin ragowar kansu. Kuma ta hanyar maimaita kayan aikin dutse don gwajin yankan zamani sun ce 'hand axe shine' Swiss army knife 'na mutanen da suka gabata - wanda zai iya karya kasusuwa, jijiyoyi da fata. Masu bincike da ke nazarin ragowar giwa (rib da aka nuna) a Isra'ila sun gano alamun ragowar dabbobi a kan kayan aiki na farko da ake kira 'handax da scrapers' tare da alamun yankewa a cikin ragowar kansu. Wannan bincike ya ce shi ne karo na farko da aka tabbatar da hujja game da kisan kare dangi na farko. Sai a yi amfani da na'urar da ta fi ƙanƙanta da ta fi ta da hankali don a ware gashin dabba da kitsen dabba daga tsokoki. Farfesa Ran Barkai, Natasha Solodenko da Andrea Zupanchich daga Jami'ar Tel Aviv na Ma'aikatar Archaeology da Ancient Near Eastern Cultures ne suka gano kayan aikin da ragowar a wani rukunin Lower Paleolithic a Revadim, Isra'ila. Tawagar ta yi amfani da wata dabara da ake kira 'binciken lalacewa' wanda ya kunshi duba farfajiyoyi da gefuna na kayan aikin don tantance aikinsu. Masu binciken sun yi nazarin kayan aiki guda uku da aka samo a cikin dutsen Revadim a Isra'ila - flake, biface ko 'hand axe' da scraper. Babu alamun amfani ko ragowar ganowa da aka samo a kan flake. Biface da scraper duka sun nuna 'kyakkyawan adanawa da bayyanannun alamun amfani da amfani'. Hanyoyin amfani da biface suna nuna sarrafa'matsakaici mai wuya' wanda aka yi imanin cewa hujja ce ta fata. Maimakon haka, mai ƙwanƙwasawa ya nuna alamun "mai laushi ko matsakaici". An yi imanin cewa wannan dabba ce. Dukkanin kayan aikin sun nuna ragowar adipocere, ko kitsen dabba kuma a kan mai tarawa, an sami duka kyallen takarda da ragowar kayan lambu. Hakanan ya yi amfani da abin da ake kira Fourier Transform InfraRed (FTIR) analyzer analyzer don gano ragowar kwayoyin. Jirgin sama mai saukar ungulu...
An samo kayan aiki da ragowar a wani rukunin Lower Paleolithic a Revadim, Isra'ila. Masana sun yi amfani da 'amfani da lalacewa' da kuma Fourier Transform Infrared (FTIR) bincike. Wadannan matakai ne da ke tantance aiki da kuma gano ragowar kwayoyin. Wannan bincike shi ne karo na farko da aka samu tabbacin kisan kare dangi. Kuma ta hanyar yin kwafin kayan aikin dutse don gwajin yankan zamani, masu binciken sun ce 'hand axe' shine 'yan bindigar sojojin Switzerland' na mutanen da suka gabata. Zai iya yanke kasusuwa, jijiya mai wuya, da fata. An yi amfani da'scraper' mai laushi don raba fur da kitsen dabba daga tsoka.