Tabach, whose research paper on the subject has been published in the Nucleic Acids Research journal, said that the technique “is simple and based on the fact that genes that work together or those that play an important role in biology will be present together in organisms that need them. Conversely, genes connected to a particular function like vision will disappear from species that have lost the power of sight (like cave fish or moles), and may therefore be identified by a comparison to the genes in normal animals.”