We often think of categories as fixed, with a species being a species no matter what. The thing is, life doesn’t have to follow our rules. Hosted by: Michael Aranda SciShow has a spinoff podcast! It's called SciShow Tangents. Check it out at www.scishowtangents.org ---------- Support SciShow by becoming a patron on Patreon: www.patreon.com/scishow ---------- Huge thanks go to the following Patreon supporters for helping us keep SciShow free for everyone forever: Kevin Carpentier, Eric Jensen, Matt Curls, Sam Buck, Christopher R Boucher, Avi Yashchin, Adam Brainard, Greg, Alex Hackman, Sam Lutfi, D.A. Noe, Piya Shedden, KatieMarie Magnone, Scott Satovsky Jr, Charles Southerland, Patrick D. Ashmore, charles george, Kevin Bealer, Chris Peters ---------- Looking for SciShow elsewhere on the internet? Facebook: www.facebook.com/scishow Twitter: www.twitter.com/scishow Tumblr: scishow.tumblr.com Instagram: instagram.com/thescishow ---------- Sources: blogs.scientificamerican.com/science-sushi/evolution-watching-speciation-occur-observations/ www.ncbi.nlm.nih.gov/pmc/articles/PMC4702127/ academic.oup.com/mbe/article/36/8/1671/5480301 www.youtube.com/watch?v=udZUaNKXbJA www.journals.uchicago.edu/doi/10.1086/600084 www.zora.uzh.ch/id/eprint/24569/1/Ditte.pdf www.annualreviews.org/doi/10.1146/annurev.ecolsys.27.1.83 www.sciencedirect.com/science/article/abs/pii/0169534794901244?via%3Dihub www.nytimes.com/2014/01/14/science/scientists-find-rare-hybrid-of-two-other-dolphin-species.html?smid=pl-share bsapubs.onlinelibrary.wiley.com/doi/abs/10.1002/j.1537-2197.1938.tb09237.x faculty.fortlewis.edu/mccauley_r/quercus_seminar/Hybrid%20speciation%20review%20paper.pdf www.sciencemag.org/news/2018/06/what-turns-bees-killer-bees www.cbsnews.com/news/thousands-of-bees-attack-texas-couple-kill-horses/ www.bbc.com/earth/story/20151123-are-killer-africanized-bees-really-that-dangerous annals.org/aim/article-abstract/700250/health-problems-associated-african-bees?doi=10.7326%2f0003-4819-104-2-267 www.sciencemag.org/news/2016/10/chimps-and-bonobos-had-flings-and-swapped-genes-past www.sciencedirect.com/science/article/pii/S0960982206014102 www.nationalgeographic.org/encyclopedia/speciation/ www.ncbi.nlm.nih.gov/pubmed/16701374/ www.youtube.com/watch?v=6Hfelo_qAw0 www.karger.com/Article/FullText/351998 academic.oup.com/mbe/article/36/8/1671/5480301 www.ncbi.nlm.nih.gov/pmc/articles/PMC3089819/ bioone.org/journals/Evolution/volume-55/issue-7/0014-3820(2001)055[1325:HPSFGI]2.0.CO;2/HYBRID-POPULATIONS-SELECTIVELY-FILTER-GENE-INTROGRESSION-BETWEEN-SPECIES/10.1554/0014-3820(2001)055[1325:HPSFGI]2.0.CO;2.short advances.sciencemag.org/content/3/6/e1602996 www.nationalgeographic.com/news/2014/1/140111-hybrid-dolphin-species-ocean-animal-science/#close www.sciencedirect.com/science/article/pii/S0092867407013402 www.nature.com/articles/nature11041 www.nature.com/articles/s41559-017-0437-7?utm_source=commission_junction&utm_medium=affiliate academic.oup.com/jhered/article/89/2/121/2186536 web.archive.org/web/20170314154734/https://blogs.scientificamerican.com/evo-eco-lab/species-concepts/ Image Sources: commons.wikimedia.org/wiki/File:Italian_Sparrow.jpg commons.wikimedia.org/wiki/File:House_Sparrow_(31214115261).jpg commons.wikimedia.org/wiki/File:Passer_Hispaniolensis_Male.JPG

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