Researchers propose experiment to measure the gravitational force of milli-gram objects, reaching almost into the quantum realm.

Neutrinos, gravitational waves, light deflection on the sun � the history of physics is full with phenomena once believed immeasurably small but now yesterday�s news. And on the list of impossible things turned possible, quantum gravity might be next.
Quantum gravitational effects have widely been believed inaccessible by experiment because enormously high energy densities are required to make