In a recent paper Becker et al., explain the greatest extinctions in the earth history at the P/Tr boundary by the impact of an extraterrestrial object and consider that hypothesis proven by the presence of C60 and C 60 endohedrally filled by helium and argon in extraterrestrial isotope ratio. This paper rises some analytical aspects of those determinations which do not seem to be sufficiently well founded.
|Number of pages||2|
|Journal||Magyar Kemiai Folyoirat, Kemiai Kozlemenyek|
|Publication status||Published - May 1 2002|
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