Tai pala meteoritas ne gamta? Ishgalvotas daiktas kad vaikams priesh miega pasakoje papasakoti? O gal meteoritai niekada nekrisdavo y zheme ir savo medzhiagu nepalikdavo chia? Tiesiog surasti jy gamtoje ta izotopa kuris ilgai gyvena buvo sudetinga, bet remiantis visais skaichiavimais chebra zhinojo kad toje mendelejevo lenteles vietoje kazhkas turejo buti eme ir susintetino nesiparindami... problem? FX "esguires" wrote in message news:ilrien$v2c$1@trimpas.omnitel.net... trace quantities visokiuose meteorituose? nu jo... "FX" <someone@microsoft.com> wrote in message news:ilosob$imb$1@trimpas.omnitel.net... Taip. 1. Plutonium is the heaviest primordial element, by virtue of its most stable isotope, plutonium-244, whose half-life of about 80 million years is just long enough for the element to be found in trace quantities in nature. 2. Jei ka dar gali pasiskaityti shita veikala: http://www.nature.com/nature/journal/v234/n5325/abs/234132a0.html FX