  Modern numerical simulations of the formation of the first stars predict that
the first stars formed in multiples. In those cases, the chemical yields of
multiple supernova explosions may have contributed to the formation of a next
generation star. We match the chemical abundances of the oldest observed stars
in the universe to a database of theoretical supernova models, to show that it
is likely that the first stars formed from the ashes of two or more
progenitors.
