  To increase by a major step the present sensitivity for dark matter and
double beta decay search, a new project is suggested, which would operate
'naked' GErmanium detectors in liquid NItrogen as shielding in an Underground
Setup (GENIUS). In a first step using 100 kg of natural Ge a large part of the
MSSM parameter space for prediction of neutralinos as cold dark matter will be
covered making the experiment complementary to LHC in the search for
supersymmetry. In the second step use of one ton of enriched 76Ge would yield a
sensitivity for double beta decay for the effective Majorana neutrino mass of
\0.01 eV. This would be a breakthrough for neutrino physics. GENIUS would also
be a breakthrough into the multi-TeV range for many other beyond standard
models currently discussed, and the sensitivity would be comparable or even
superior to LHC or NLC for various quantities such as right-handed W boson
mass, R-parity violation, leptoquark or compositeness searches, or left-handed
heavy neutrinos.
