Hauv tebchaws Indonesia pom ib daim duab txog 44.000 xyoo

Ib daim duab tshawb pom ntawm phab ntsa ntawm 44.000-laus-laus hnub nyoog lub qhov tsua hauv tebchaws Indonesia tau pom.

Cov kos duab zoo li pom tus twm tua ntawm ib nrab ntawm tib neeg, qee tus tsiaj uas tuav hmuv thiab kab tias hlua.

Qee cov kws tshawb nrhiav xav tias qhov kev tshwm sim yuav yog zaj dab neeg tshaj qub nyob hauv lub ntiaj teb.

Cov kev tshawb pom tau nthuav tawm nyob rau hauv phau ntawv Journal Xwm los ntawm tus kws tshawb fawb keeb kwm tuaj ntawm Griffith University of Brisbane, Australia.

Adam Brumm - tus kws tshawb nrhiav txog Griffith - pom cov duab no yog thawj zaug ob xyoos dhau los, tom qab tus npoj yaig hauv tebchaws Indonesia tau kos ib daim duab kom mus txog lub qhov tsua.

Brumm hais tias "Cov duab no tau tshwm sim rau kuv iPhone." "Kuv xav tias kuv hais cov lus uas muaj plaub-tsab ntawv hauv Australian lo lus nrov nrov."

Tus tsim hauv Indonesian tsis yog qhov qub tshaj plaws hauv lub ntiaj teb. Xyoo tas los, cov kws tshawb fawb tau hais tias lawv pom "tus qauv tsim kho tshiab tshaj plaws ntawm tib neeg" rau ntawm pob zeb ua pob zeb nyob hauv 73.000 xyoo hauv South Africa.

Cov duab kos qhia tau li cas?
Tus tsim tau pom nyob rau hauv lub qhov tsua hu ua Leang Bulu'Sipong 4 sab qab teb ntawm Sulawesi, thaj chaw Indonesian nyob sab hnub tuaj ntawm Borneo.

Lub vaj huam sib luag yuav luag tsib metres qhov ntev thiab pom tshwm qhov hom twm hu ua anoa, ntxiv rau cov npua qus pom ntawm Sulawesi.

Ntawm lawv muaj cov duab me me uas saib tib neeg - tab sis lawv kuj muaj cov tsiaj yam ntxwv xws li tails thiab muzzles.

Hauv seem, ib qho anoa ntws los ntawm ntau cov duab tuav cov hmuv.

Brumm hais tias "Kuv yeej tsis tau pom ib yam zoo li no ib zaug li." "Kuv txhais tau tias, peb tau pom ntau pua lub pob zeb kos duab hauv thaj chaw no - tab sis peb tsis tau pom dua ib yam zoo li lub chaw tua tsiaj."

Txawm li cas los xij, lwm cov kws tshawb nrhiav tau xav tias lub vaj huam sib luag sawv cev ib zaj dab neeg thiab hais tias nws yuav yog cov xim pleev xim rau cov duab ntev ntev.

Paul Pettitt, tus kws tshawb fawb keeb kwm qub thiab kws paub txog pob zeb los ntawm Durham University tau hais tias "Yog tias nws yog qhov tshwm sim tshwm sim," nws hais rau Xwm.

Yuav ua li cas peb thiaj paub tias nws muaj hnub nyoog 44.000 xyoo?

Pab pawg neeg tau txheeb xyuas cov calcite "paj kws" uas tau sau rau ntawm daim duab.

Cov pa hluav taws xob uranium hauv cov ntxhia tau maj mam poob mus rau hauv thorium, yog li pab pawg tau ntsuas cov theem ntawm cov isotopes sib txawv ntawm cov khoom no.

Lawv pom tias calcite rau ntawm tus npua pib tsim tsawg kawg 43.900 xyoo dhau los, thiab tso nyiaj ntawm ob tus twm muaj tsawg kawg yog 40.900 xyoo.

Muaj tsawg kawg 242 qhov tsua lossis chaw nyob nrog cov duab txheej thaum ub hauv Sulawesi ib leeg - thiab cov chaw tshiab tau tshawb pom txhua xyoo.

Nws piv rau lwm yam txuj ci thaum ub li cas?
Tej zaum nws yuav tsis yog qhov tsim qub tshaj plaws, tab sis cov kws tshawb nrhiav hais tias nws yuav yog zaj dab neeg tshaj qub puas tau pom dua.

"Yav dhau los, pob zeb kos duab pom nyob hauv European cov chaw yos rov los txog 14.000 - 21.000 xyoo dhau los tau pom tias yog qhov tseem ceeb tshaj plaws hauv kev ua haujlwm hauv ntiaj teb," cov ntawv xov xwm hauv Xwm.

Sulawesi cov qauv tsim kuj tseem yog qhov qub tshaj plaws ntawm tsiaj tsim thaum pom.

Xyoo tas los, ib lub qhov tsua nyob hauv Borneo - ntseeg tias yog qhov qub tshaj plaws ntawm ib tus tsiaj - tau pom tias muaj tsawg kawg yog 40.000 xyoo.