Now that we have taken a look at the brutal power of fission, lets take a look at its younger sibling. Nuclear fusion is a much newer idea than fission. It is not yet done on a large-scale and we cannot harness its energy properly, but it shows potential to be more useful, safer and easier than fission, so what is it?
Well in fission, we take one heavy thing and split it in two. Fusion is the opposite. We take two very light particles and push them together to make a new one.