  Calcium aluminum rich inclusions (CAIs) are one of the first solids to have
condensed in the solar nebula, while presolar grains formed in various evolved
stellar environments. It is generally accepted that CAIs formed close to the
Sun at temperatures above 1500 K, where presolar grains could not survive, and
were then transported to other regions of the nebula where the accretion of
planetesimals took place. In this context, a commonly held view is that
presolar grains are found solely in the fine-grained rims surrounding
chondrules and in the low-temperature fine-grained matrix that binds the
various meteoritic components together. Here we demonstrate, based on noble gas
isotopic signatures, that presolar SiC have been incorporated into fine-grained
CAIs in the Allende carbonaceous chondrite at the time of their formation, and
have survived parent body processing. This finding provides new clues on the
conditions in the nascent solar system at the condensation of first solids.
