  Neutron-capture elements in low metallicity Galactic halo stars vary widely
both in overall contents and detailed abundance patterns. This review discusses
recent observational results on the n-capture elements, discussing the
implications for early Galactic nucleosynthesis of: (a) the star-to-star
``bulk'' variations in the n-capture/Fe abundance ratios; (b) the distinct
signature of rapid n-capture synthesis events in many (most?) of the lowest
metallicity stars; (c) the existence of metal-poor stars heavily enriched in
the products of slow n-capture synthesis reactions; and (d) the now-routine
detection of radioactive thorium (and even uranium in one and possibly two
cases) in the spectra of metal-poor stars.
