If you accept this short description of science then you will probably have serious doubts about the existence of the phenomenon known as Cold Fusion.
Fusion refers to the joining of two nuclei to form one larger nucleus.
The energy released from the breaking apart of the nucleus is greater than the energy required to fuse the two smaller nuclei, hence nuclear power is produced. The difference between cold fusion and conventional fusion is in the amount of energy needed for fusion to take place. Since the two smaller nuclei are both positively charged, they naturally repel one another. Massive amounts of kinetic energy are needed for conventional fusion. This energy is usually supplied by particle accelerators or extremely high temperatures approaching 50 million degrees Celsius.