  The standard Big-Bang theory predicts a cosmic neutrino background with an
average number density of $\sim 100/cm^3$ per flavor. The most promising way of
its detection is measuring the feeble ``neutrino wind'' forces exerted on
macroscopic targets. The expected acceleration is $\sim 10^{-23} cm/s^2$ for
Dirac neutrinos with a local number density $\sim 10^7/cm^3$. A novel torsion
balance design is presented, which addresses the sensitivity-limiting factors
of existing balances, such as seismic and thermal noise, and angular readout
resolution and stability.
