Barrett's esophagus refers to an abnormal change in the cells of the lower portion of the esophagus. It is characterized by the replacement of the normal stratified squamous epithelium lining of the esophagus by simple columnar epithelium with goblet cells (which are usually found lower in the gastrointestinal tract).
U.S. Space Camp is a camp and related programs owned and operated by the Alabama Space Science Exhibit Commission's U.S. Space & Rocket Center in Huntsville, Alabama.
Las Vegas Museum: Historic Nevada Site Before the Nevada Test Site, the United States performed nuclear tests in the Marshall Islandsâ Bikini Atoll. This was located 4,600 miles from the mainland of the United States. The Guardian reports that the nuclear tests done more than 60 years ago made the islands unsuitable for living evenâ¦