520-milyan oo sano jir shan indhood leh ayaa muujinaya asalka ArthropodGaleyal shan-indho leh oo ku dabaalanayay badaha in ka badan 500 milyan oo sano ka hor waxay noqon kartaa 'xiriirka maqan' ee asalka arthropods, fossil ayaa shaaca ka qaadayMRU.INK⬝ Abriil 23,2023, 12 20:XNUMX subaxnimo