  Particular advantages of chiral molecules for direct detection of the
time-dependence of pseudoscalar and the timelike-component of pseudovector
cosmic fields are highlighted. Such fields are invoked in different models for
cold dark matter or in the Lorentz-invariance violating standard model
extensions and thus are signatures of physics beyond the standard model. The
sensitivity of a twenty year old experiment with the molecule CHBrClF to
pseudovector cosmic fields as characterized by the parameter $|b^\mathrm{e}_0|$
is estimated to be $\mathcal{O}(10^{-12}\,\mathrm{GeV})$ and allows to predict
the sensitivity of future experiments with favorable choices of chiral
molecular probes to be $\mathcal{O}(10^{-17}\,\mathrm{GeV})$, which will be an
improvement of the present best limits by at least two orders of magnitude.
