Los ntawm fossil roj tsim hluav taws xob mus rau nuclear fais fab nroj tsuag, Hikelok muab ntau yam txheej txheem ntsuas cov khoom siv.Txawm hais tias koj yog cov khoom lag luam uas tau tsav los yog muaj kev tswj xyuas cov dej tshwj xeeb, Hikelok cov kws tshaj lij tsim hluav taws xob tuaj yeem pab koj rov qab kho cov txheej txheem uas twb muaj lawm, lossis tsim thiab tsim ib qho tshiab.