Genealogy historically means the search for family history and lineage through the use of documentation and records such as those for births, deaths or marriages. Due to the advances in modern technology this study can now take a number of more scientific approaches. One such scientific approach is through the use of DNA. Deoxyribonucleic Acid is a nucleic acid that is the blue print for all living organisms and can be used to determine the genetic make up of any living things. In humans a family will contain similar traits when it comes to there DNA that can be used to trace lineage or ancestry. There is a company that uses DNA when they undertake a genealogical search for there clients and if you would like to learn more about them then you can do so by checking out there web site at www.worldfamilies.net. This site explains how their techniques can help their clients answer many genealogical questions.