Ntau cov khoom lag luam iav ua tau tau ploj mus nyob rau sab hnub poob ntawm Tuam Tshoj thaum ub, kev sib tham rov qab txog 2,000 xyoo, thiab cov khoom qub tshaj plaws hauv ntiaj teb yog 4,000 xyoo. Raws li cov kws tshawb fawb archaeologists, lub khob iav yog qhov zoo tshaj plaws khaws cia hauv ntiaj teb, thiab nws tsis corrode yooj yim. Chemists hais tias iav yog ntxaib tus muam ntawm cov xuab zeb, thiab ntev npaum li cov xuab zeb nyob hauv ntiaj teb, lub iav nyob hauv ntiaj teb.
Tsis muaj teeb meem twg muaj peev xwm corrode lub khob khob, nws tsis txhais tau tias lub khob iav yog invincible invincible hauv xwm. Txawm hais tias nws tsis tuaj yeem rhuav tshem cov tshuaj, nws tuaj yeem raug lub cev "rhuav tshem". Cov cua thiab dej ntawm qhov yog nws nemesis loj tshaj plaws.
Nyob rau hauv Fort Bragg, California, Asmeskas, muaj cov xim xim xim. Thaum koj taug kev hauv, koj tuaj yeem pom tias nws yog tsim cov khoom uas tsis suav nrog cov paj yeeb dawb. Cov pellets no tsis yog pob zeb nyob rau hauv qhov, tab sis cov fwj iav uas tib neeg muab pov tseg. Thaum xyoo 1950, nws tau siv los ua cov dej khib nyiab pov tseg rau cov iav pov tseg, tsuas yog tom qab 60 xyoo, lawv tau polished los ntawm cov dej hiav txwv ntawm dej hiav txwv Pacific du thiab puag ncig.
Hauv lwm 100 xyoo lossis yog li, cov yeeb yuj iav xuab zeb yuav ploj mus, cov kws tshawb fawb hais. Vim tias cov dej hiav txwv thiab hiav txwv breature ntawm lub khob, lub sijhawm dhau los, cov iav tau daig hauv daim ntawv ntawm cov dej hiav txwv, thiab tom qab ntawd tog rau hauv qab hiav txwv.
Dazzling puam coj peb tsis yog tsuas yog pom kev lom zem, tab sis kuj tseem ua rau xav xav txog yuav ua li cas cov khoom siv iav.
Txhawm rau tiv thaiv cov iav pov tseg los ntawm kuab paug ib puag ncig, peb feem ntau siv cov hau kev rov ua dua tshiab. Zoo li cov khoom siv tshuaj txhuam hniav, siv cov iav ua haujlwm tau muab tso rau hauv qhov cub hluav taws xob kom melted dua. Txij li iav yog sib tov thiab tsis muaj qhov sib tov sib xyaw, lub cub tawg yog teeb tsa rau ntau qhov kub thiab txias, thiab txhua ntu yuav yaj lub khob ntawm cov qoob loo sib txawv thiab cais lawv. Ntawm txoj kev, tsis xav tau impurities kuj tseem tuaj yeem raug tshem tawm los ntawm kev ntxiv lwm yam tshuaj lom neeg.
Cov khoom siv ntawm cov khoom siv iav hauv kuv lub tebchaws tau pib lig, thiab tus nqi siv tau txog 13%, lagging qab cov teb chaws nyob hauv Tebchaws Europe thiab Tebchaws Asmeskas. Cov kev tsim kev lag luam uas cuam tshuam nyob rau lub teb chaws saum toj no tau dhau los ua kev paub tab, thiab cov qauv siv hluav taws xob thiab cov qauv tsim nyog siv thiab kawm hauv kuv lub tebchaws.
Lub Sijhawm Post: Tsib Hlis-12-2022