Christmas in Washington Christmas in Washington Christmas in Washington was an annual Christmas television special that aired for many years on the U.S. TNT network. It ended in 2015 after a 33-year run. One of two annual holiday specials produced by George Stevens Jr. (the other being the "Kennedy Center Honors"), the variety show first aired in 1982 on NBC before moving to its most recent home on TNT in 1998. Recorded in Washington, D.C. at the National Building Museum, on the second Sunday of each December before being re-edited for later broadcast, "Christmas in Washington" is a one-hour concert featuring artists from
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.