Ekwutọpụrụ mmalite mmalite nke ụwa mbụ

Na 2005, Western University cosmochemist Audrey Bouvier, site n'enyemaka nke Maud Boyet nke Blaise Pascal University, chọpụtara na ọnụnọ nke Neodymium-142 (142Nd; isotope nke neodymium kemịkalụ). Achọpụtara nke a ọ bụghị naanị na ihe ndị dị n'ụwa, kamakwa n'ihe ndị ọzọ dị na mbara ala, site na iji ionization mass spectrometry nke thermal ionization. 

Duo mere nchọpụta a site na nyocha chondrites, Meteorite nke enwetara ịnweta nke a na-akpọkarị "ihe mgbochi ụwa" n'etiti obodo sayensị. Nnyocha zuru ezu nke ihe owuwu nkume ndị a gosiri na akara nke 142nd pụtara ìhè n'ime meteorites ndị a. N'adịghị ka nkwenkwe ndị a ma ama na e mepụtara isotope na Ụwa, dịka mbara ala n'onwe ya malitere na mmalite ya. Nnyocha ndị ọzọ e mere nyere aka mee ka a ghọta eziokwu ahụ bụ na neodymium pụtara ìhè n'ime ihe ndị dị n'èzí, ọ bụ ezie na n'ụdị dị iche iche nke isotope. Ya mere, ha kwubiri na mmalite ụwa nwere ike jikọta ya na nke mbara ala ndị ọzọ karịa ka ndị ọkà mmụta sayensị chere. A na-eme nyocha ndị ọzọ iji gosi na nkwupụta ndị a ziri ezi.