This list of unsolved deaths includes notable cases where victims have been murdered or have died under unsolved circumstances, including murders committed by unknown serial killers. The mysteriously-deceased are listed chronologically by year.
Genetic engineering, also called genetic modification, is the direct manipulation of an organism's genome using biotechnology.
The chemical structure of genes. Genetic engineering became possible only when scientists had discovered exactly what is a gene. Prior to the 1950s, the term gene was used to stand for a unit by which some genetic characteristic was transmitted from one generation to the next.