sloth: References & Edit History

Article Contributors

Primary Contributors

  • Alfred L. Gardner
  • The Editors of Encyclopaedia Britannica
    Encyclopaedia Britannica's editors oversee subject areas in which they have extensive knowledge, whether from years of experience gained by working on that content or via study for an advanced degree. They write new content and verify and edit content received from contributors.

Other Encyclopedia Britannica Contributors

Article History

Type Description Contributor Date
Invalidated site: PNAS - Skeletal development in sloths and the evolution of mammalian vertebral patterning. Oct 01, 2026
Add new Web site: PNAS - Skeletal development in sloths and the evolution of mammalian vertebral patterning. Jul 24, 2026
Add new Web site: Cell Press - Current Biology - How sloths got their sloth. Oct 24, 2025
Add new Web site: Calvin Digital Commons - The Vice of Sloth: Some Historical Reections on Laziness, Eort, and Resistance to the Demands of Love (PDF). Oct 22, 2025
Questions and answers added. Mar 20, 2025
Add new Web site: National Center for Biotechnology Information - PubMed Central - On the move: sloths and their epibionts as model mobile ecosystems. Jun 24, 2024
Add new Web site: BBC - Why do sloths move so slowly? Dec 04, 2023
Add new Web site: Smithsonian's National Zoo and Conservation Biology Institute - Why are Sloths So Slow? And Other Sloth Facts. Jun 20, 2023
Add new Web site: Montclair State University - PRISM - Sloths. May 11, 2023
Article revised and updated. Mar 08, 2022
Corrected display issue. Mar 02, 2021
Changed “suborder Phyllophaga” to “order Pilosa” and noted that sloths have five upper molars and four lower molars. Feb 09, 2021
Corrected display issue. Jun 13, 2019
Add new Web site: Animal Corner - Sloth. Aug 23, 2016
Add new Web site: Science Kids - Fun, Science and Technology for Kids! - Fun Sloth Facts for Kids. Aug 23, 2016
Add new Web site: LiveScience - Sloths: The World's Slowest Mammals. Aug 23, 2016
Weights of newborn sloths of the genera Bradypus and Choloepus added. May 31, 2016
Add new Web site: A-Z Animals - Sloth. May 09, 2014
Add new Web site: Buzzle.com - Life Cycle of a Sloth. Jun 12, 2013
Add new Web site: National Geographic Kids - Animals - Sloth. Jun 12, 2013
Add new Web site: Animal Planet - Sloth. Jun 12, 2013
Added image of two-toed sloth. May 27, 2011
Added text mentioning the existence of a fourth three-toed sloth species (Bradypus pygmaeus). Jan 11, 2011
Added image of three-toed sloth. Aug 26, 2010
Added new Web site: Animal Planet - Sloth. Apr 14, 2009
Added new Web site: Texas State Historical Association - The Handbook of Texas Online - Biography of Elisabeth Ney. May 27, 2008
Added new Web site: Enchanted Learning - Sloth. Mar 10, 2008
Added new Web site: Xenarthra.Org. Sep 11, 2006
Article revised. Mar 14, 2002
Article revised. Nov 02, 2001
Article added to new online database. Jul 23, 1999
View Changes:
Article History
Revised:
By: