The Office Christmas specials were released on VHS and DVD in the UK on 25 October 2004 by BBC Video. Extra features include an audio commentary on Part 2 by Merchant and Gervais, a retrospective documentary entitled "The Office: Closed For Business", the full video for Brent's version of "If You Don't Know Me By Now", a featurette about the cast and crew collecting the Golden Globes, and a studio version of "Freelove Freeway"—Brent's song from Series 1, Episode 4. It was released in the United States on 16 November 2004 with the same special features. The Office Christmas specials "The Office" Christmas Specials
Most recent common ancestor all of the modern population. Due to pedigree collapse, modern individuals may still exhibit clustering, due to vastly different contributions from each of ancestral population . Most recent common ancestor In biology and genealogy, the most recent common ancestor (MRCA, also last common ancestor (LCA), or concestor) of any set of organisms is the most recent individual from which all the organisms are directly descended. The term is also used in reference to the ancestry of groups of genes (haplotypes) rather than organisms. The MRCA of a set of individuals can sometimes be determined by referring to an established pedigree.