We heat that solution to, let's say, 80 degrees Celsius. And what we know is from this graph, all the DNA molecules in our solution will be dissociated. Now, what happens if I bring that temperature back down to, let's say, 60 degrees Celsius? Well, as I begin to bring the temperature down, those molecules, those individual strands of DNA, will begin to reassociate. So they will begin to form that double helix structure. And this process is known as annealing.