  This work investigates the dark matters structures that form on the smallest
cosmological scales. We find that the types and abundances of structures which
form at approximately Earth-mass scales are very sensitive to the nature of
dark matter. We explore various candidates for dark matter and determine the
corresponding properties of small-scale structure. In particular, we discuss
possibilities for indirect detection of dark matter through small-scale
structure, and comment on the potential of these methods for discriminating
between dark matter candidates.
