History of diabetes further clarified in 1921, when Sir Frederick Grant Banting and Charles Herbert Best repeated the work of Von Mering and Minkowski, and went further to demonstrate they could reverse induced diabetes in dogs by giving them an extract from the pancreatic islets of Langerhans of healthy dogs. The islets of Langerhans was discovered in 1869 by an anatomist named Paul Langerhans. He identified the keys cells in the pancreas which produce the main substance that controls glucose levels in the body. Banting, Best, and colleagues (especially the chemist Collip) went on to purify the hormone insulin from bovine pancreases at
Where Are You, Christmas? 2009, "Where Are You, Christmas" was covered by Hollie Steel, the child soprano from "Britain Got Talent" finals. On October 29, 2009, Then There Were None released a cover of the Christmas single. During a Christmas concert in 2011, a cover of the song was performed by The Piano Guys (Jon Schmidt, Steven Sharp Nelson), featuring Jon's young daughter Sarah Schmidt. Pentatonix covered the song for their 2018 album "Christmas Is Here!". Where Are You, Christmas? "Christmas, Why Can't I Find You?" is a song co-written by James Horner, Will Jennings and Mariah Carey, for the movie "How the Grinch