The 2020 Nobel Prize in Chemistry went to Emmanuelle Charpentier and Jennifer Doudna for "for the development of a method for genome editing”. Their work has markedly added to the toolbox available to researchers in the life sciences and in my humble opinion, it is worth talking about. To understand why this work is so important, we will need to have some introductory episodes first and this here is part number I, where we will discuss the structure of DNA. I can now be reached on twitter under @ChemistryinEve1 , if you have feedback that you would like to share. Alternatively, you can send an email to [email protected] . Sources · https://www.nobelprize.org/prizes/chemistry/2020/summary/ · https://en.wikipedia.org/wiki/Human_genome · https://en.wikipedia.org/wiki/Genome · https://en.wikipedia.org/wiki/DNA · https://en.wikipedia.org/wiki/List_of_Nobel_laureates · https://en.wikipedia.org/wiki/Chromosome · https://en.wikipedia.org/wiki/Organelle · https://en.wikipedia.org/wiki/Mitochondrion · https://en.wikipedia.org/wiki/Cell_nucleus · https://en.wikipedia.org/wiki/Nucleoid