Tšimoloho ea pele ea Lefatše e ile ea senyeha

Ka 2005, Cosmochemist ea Univesithi ea Bophirimela Audrey Bouvier, ka thuso ea Maud Boyet oa Univesithi ea Blaise Pascal, o ile a sibolla boteng ba Neodymium-142 (142Nd; isotope ea neodymium ea lik'hemik'hale). Sena ha se fumanehe feela linthong tsa lefats'e, empa le lisebelisoa tse ling tsa lipolanete, ka tšebeliso ea mocheso oa ionization mass spectrometry. 

Ba babeli ba fumane sena ka ho hlahlobisisa chondrites, meteorite e kentsoeng ka liminerale eo hangata ho thoeng ke “Libaka tsa Moaho tsa Lefatše” har’a mokhatlo oa saense. Tshekatsheko e e tseneletseng ya dipopego tse tsa matlapa e senotse gore motlhala wa 142Nd o a bonala ka har'a meteorites tsena. Ho fapana le tumelo e atileng ea hore isotope e entsoe Lefatšeng, kaha polanete ka boeona e ile ea ntlafala methating ea eona ea pele. Lipatlisiso tse ling tse ileng tsa etsoa li ile tsa thusa ho hlakisa taba ea hore neodymium e ne e bonahala le meahong e kantle ho lefatše, leha e le ka mefuta e fapaneng ea isotope. Kahoo, ba ile ba etsa qeto hore tšimoloho ea Lefatše e ka ’na eaba e amana haufi-ufi le ea lipolanete tse ling ho feta kamoo bo-rasaense ba neng ba nahanne kateng. Liphuputso tse ling li ntse li etsoa ho netefatsa bonnete ba liqoso tsena.