Time-Varying Nuclear Decay Parameters and Dark Matter
  Recently published data suggest a possible solar influence on some nuclear
decay rates, including evidence for an annual variation attributed to the
varying Earth-Sun distance. Here, we consider the possibility that the annual
signal seen by the DAMA collaboration, and interpreted by them as evidence for
dark matter, may in fact be due to the radioactive contaminant K-40, which is
known to be present in their detector. We also consider the possibility that
part of the DAMA signal may arise from relic big-bang neutrinos.
