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Help us make well-researched science videos at https://patreon.com/MinuteEarth We want to tell important stories about our natural world, but some ideas that seem great initially end up being way too big to cover in a short video. LEARN MORE ************** To learn more about this topic, start your googling with these keywords: - Species concept: A methodology for determining whether two organisms are members of the same species. - Speciation: The evolutionary process by which new species arise. - Polyploid speciation: Speciation that occurs due to a change in the number of chromosomes. - Allopatric speciation: Speciation that occurs due to geographic isolation. SUPPORT MINUTEEARTH ************************** If you like what we do, you can help us!: - Become our patron: https://patreon.com/MinuteEarth - Our merch: http://dftba.com/minuteearth - Our book: https://minuteearth.com/books - Sign up to our newsletter: http://news.minuteearth.com - Share this video with your friends and family - Leave us a comment (we read them!) CREDITS ********* David Goldenberg | Script Writer, Narrator and Director Lizah van der Aart | Storyboard Artist Sarah Berman | Illustration, Video Editing and Animation Nathaniel Schroeder | Music MinuteEarth is produced by Neptune Studios LLC https://neptunestudios.info OUR STAFF ************ Lizah van der Aart • Sarah Berman • Cameron Duke Arcadi Garcia i Rius • David Goldenberg • Melissa Hayes Alex Reich • Henry Reich • Peter Reich Ever Salazar • Leonardo Souza • Kate Yoshida OUR LINKS ************ Youtube | https://youtube.com/MinuteEarth TikTok | https://tiktok.com/@minuteearth Twitter | https://twitter.com/MinuteEarth Instagram | https://instagram.com/minute_earth Facebook | https://facebook.com/Minuteearth Website | https://minuteearth.com Apple Podcasts| https://podcasts.apple.com/us/podcast/minuteearth/id649211176 REFERENCES ************** Stankowski, S., & Ravinet, M. (2021). Quantifying the use of species concepts. Current biology : CB, 31(9), R428–R429. https://doi.org/10.1016/j.cub.2021.03.060 K. de Queiroz (2005), Ernst Mayr and the modern concept of species, Proc. Natl. Acad. Sci. U.S.A. 102 (suppl_1) 6600-6607. https://doi.org/10.1073/pnas.0502030102 Shu-Jin Luo, Warren E. Johnson, James L. David Smith, Stephen J. O’Brien (2010). Chapter 3 - What Is a Tiger? Genetics and Phylogeography, Editor(s): Ronald Tilson, Philip J. Nyhus, In Noyes Series in Animal Behavior, Ecology, Conservation, and Management, Tigers of the World (Second Edition), William Andrew Publishing, Pages 35-51. https://doi.org/10.1016/B978-0-8155-1570-8.00003-7 National Academies of Sciences, Medicine, Division on Earth, Life Studies, Board on Life Sciences, Committee on Assessing the Taxonomic Status of the Red Wolf, & the Mexican Gray Wolf. (2019). Evaluating the taxonomic status of the Mexican gray wolf and the red wolf. National Academies Press. https://books.google.cl/books?id=br2YDwAAQBAJ Rothfels, C. J., & Otto, S. P. (2016). Polyploid speciation. https://escholarship.org/content/qt0s7998kv/qt0s7998kv.pdf