Scientists have successfully created the first organism with “alien” DNA. For thousands of years, life has been written with only four letters—adenine (A), thymine (T), cytosine (C) and guanine (G), which are the names given to the DNA subunits contained in all organisms. This “normal” DNA consists of twin strands of double helix that are bound together with these four bases (A, T, C, and G). In the new ‘alien’ organism, scientists have added two new bases called, X and Y, manufacturing a new form of DNA that has never transpired before. With the construction of this living cell that has two ‘foreign’ DNA building blocks in its genome, life’s alphabet has expanded.
Extraordinarily, this “alien” organism persisted to reproduce normally, preserving the alien DNA during reproduction.