  We present a brief overview of a new generation of high-precision laboratory
and astrophysical measurements to search for ultralight (sub-eV) axion,
axion-like pseudoscalar and scalar dark matter, which form either a coherent
condensate or topological defects (solitons). In these new detection methods,
the sought effects are linear in the interaction constant between dark matter
and ordinary matter, which is in stark contrast to traditional searches for
dark matter, where the sought effects are quadratic or higher order in the
underlying interaction constants (which are extremely small).
