Mary Allen
Kodi agalu amaperekeza anthu kwanthawi yayitali bwanji? Ofufuza a pa yunivesite ya Arkansas anadzifunsa funsoli ndipo anapeza kuti galuyo ayenera kuti ankaweta pa nthawi ya Ice Age.
Kafukufuku wokhudza dzino mu zinthu zakale zakale za zaka 28,500 zochokera ku Czech Republic akusonyeza kuti panthaŵiyo panali kale kusiyana pakati pa nyama zonga mimbulu ndi mimbulu. Zakudya zosiyanasiyana zimasonyeza kuti panthawiyi galuyo anali atawetedwa kale ndi anthu, kutanthauza kuti ankasungidwa ngati ziweto. Izi ndi zomwe ofufuza adapeza mu kafukufuku wawo womwe wasindikizidwa posachedwa.
Kuti achite izi, adasanthula ndikuyerekeza minofu ya mano a nyama zonga mimbulu ndi canine. Asayansi adawona njira zodziwika bwino zomwe zimasiyanitsa agalu ndi mimbulu. Mano a agalu a Ice Age anali ndi zokanda zambiri kuposa mimbulu yoyambirira. Izi zikusonyeza kuti ankadya chakudya cholimba komanso chosalimba. Mwachitsanzo, mafupa kapena zinyalala za chakudya cha anthu.
Umboni wa Agalu Akunyumba Ubwerera Mmbuyo Zaka 28,000
Kumbali ina, makolo a mimbulu ankadya nyama. Mwachitsanzo, kafukufuku wakale akusonyeza kuti nyama zonga nkhandwe mwina zinadya nyama ya mammoth, mwa zina. "Cholinga chathu chachikulu chinali kuyesa ngati ma morphotypes ali ndi makhalidwe osiyana kwambiri okhudzana ndi kavalidwe," akufotokoza motero Peter Unger, mmodzi wa ochita kafukufuku, ku Science Daily. Njira yogwirira ntchito iyi ndiyodalirika kwambiri pakusiyanitsa ndi nkhandwe.
Kusunga agalu ngati ziweto kumatengedwa ngati njira yoyamba yoweta. Ngakhale anthu asanayambe kulima ankaweta agalu. Ngakhale zili choncho, asayansi akutsutsanabe kuti ndi liti komanso chifukwa chake anthu amaweta agalu. Akuti kuyambira zaka 15,000 mpaka 40,000 zapitazo, kutanthauza kuti m’nthawi ya Ice Age.