Ancient DNA in ice, such as the Ötzi the Iceman (Handt "et al." 1994), or through rapid desiccation, such as high-altitude mummies from the Andes (c.f. Pääbo 1986; Montiel "et al." 2001), as well as various sources of artificially preserved tissue (such as the chemically treated mummies of ancient Egypt). However, mummified remains are a limited resource. The majority of human aDNA studies have focused on extracting DNA from two sources that are much more common in the archaeological record – bone and teeth. Several other sources have also yielded DNA, including paleofaeces (Poinar "et al." 2001) and hair (Baker "et al."
Fifteen Years Ago Fifteen Years Ago "Fifteen Years Ago" is a song written by Raymond Smith, and recorded by American country music artist Conway Twitty. It was released in September 1970 as the first single and title track from the album "Fifteen Years Ago". The song was Twitty's fifth number one on the U.S. country singles chart. The single stayed at number one for a single week and spent a total of 16 weeks on the chart. The song is about a man who still thinks about a former girlfriend, with whom he had broken up 15 years earlier after a deep, emotional