I also prefer the term "melting", though I recognise that this term is potentially confusing for a lay or beginners' audience. The analogy with melting of water ice, while intuitive, may invite the misconception that DNA "dissolves" into very small molecules rather than separates into its two strands. The lede states "These thermal cycling steps are necessary to physically separate the strands (at high temperatures) in a DNA double helix (DNA melting)", and in the description of the PCR steps it says "It causes separation of DNA template and primers by disrupting the hydrogen bonds between complementary bases of the DNA strands, yielding single strands of DNA." I suggest to reword these two sentences to "These thermal cycling steps are necessary
