Imagine catching a comet.
Comets are clusters of frozen gases passing close to the Earth at high speed, whose fate is to gradually evaporate until disappearing.

Scientists at Tokyo Institute of Technology have shown that copper oxide particles on the sub-nanoscale are more powerful catalysts than those on the nanoscale. These subnanoparticles can also catalyze the oxidation reactions of aromatic hydrocarbons far more effectively than catalysts currently used in industry.