The Deadpool Salamander

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Axolotls are special salamanders. Not only to they stay in their juvenile form their whole lives, they can regenerate entire limbs! Studying how they do it could change the way we treat human limb injuries.

Special thanks to the Dallas Zoo!

References: http://bit.ly/2Gkoihd

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It’s Okay To Be Smart is hosted by Joe Hanson, Ph.D.
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Can You Keep Donating and Regrowing Your Liver?

Fun Fact: people can donate over half of their liver, and the tissue will grow back within a year! Knowing that, it seems pretty logical to assume that we could just keep donating and regrowing our livers over and over again, but is that really the case?

Special Thanks: Dr. George Michalopoulos, University of Pittsburgh School of Medicine and Medical Center

Hosted by: Hank Green

Head to https://scishowfinds.com/ for hand selected artifacts of the universe!
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Dooblydoo thanks go to the following Patreon supporters: Jerry Perez, Lazarus G, Kelly Landrum Jones, Sam Lutfi, Kevin Knupp, Nicholas Smith, D.A. Noe, alexander wadsworth, سلطان الخليفي, Piya Shedden, KatieMarie Magnone, Scott Satovsky Jr, Charles Southerland, Bader AlGhamdi, James Harshaw, Patrick D. Ashmore, Candy, Tim Curwick, charles george, Saul, Mark Terrio-Cameron, Viraansh Bhanushali, Kevin Bealer, Philippe von Bergen, Chris Peters, Justin Lentz
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Sources:
Dr. George Michalopoulos, personal communication
http://science.sciencemag.org/content/276/5309/60
https://www.mayoclinic.org/diseases-conditions/toxic-hepatitis/symptoms-causes/syc-20352202
https://link.springer.com/article/10.1007/BF02889179
http://onlinelibrary.wiley.com/doi/10.1002/hep.20969/full
http://onlinelibrary.wiley.com/doi/10.1002/hep.20214/full
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2701258/
http://onlinelibrary.wiley.com/doi/10.1111/j.1432-2277.2005.00158.x/full
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3976740/

7 Organs You Could Totally Live Without

Most people know that they don’t need their appendix, but what other organs can humans live without?

Hosted by: Hank Green
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Support SciShow by becoming a patron on Patreon: https://www.patreon.com/scishow
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Dooblydoo thanks go to the following Patreon supporters: Kelly Landrum Jones, Sam Lutfi, Kevin Knupp, Nicholas Smith, D.A. Noe, alexander wadsworth, سلطا الخليفي, Piya Shedden, KatieMarie Magnone, Scott Satovsky Jr, Bella Nash, Charles Southerland, Bader AlGhamdi, James Harshaw, Patrick Merrithew, Patrick D. Ashmore, Candy, Tim Curwick, charles george, Saul, Mark Terrio-Cameron, Viraansh Bhanushali, Kevin Bealer, Philippe von Bergen, Chris Peters, Justin Lentz
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Sources:

http://hemifoundation.homestead.com/facts.html
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4729844/
http://www.slate.com/articles/news_and_politics/explainer/2013/03/pope_francis_has_only_one_lung_is_that_a_problem.html
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3472481/
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC64801/
https://www.niddk.nih.gov/health-information/digestive-diseases/digestive-system-how-it-works
https://www.nostomachforcancer.org/about/life-without-a-stomach/gastrectomy
https://www.nhs.uk/conditions/gastrectomy/risks/
https://www.merckmanuals.com/home/blood-disorders/spleen-disorders/overview-of-the-spleen
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5605342/
https://www.ncbi.nlm.nih.gov/pubmedhealth/PMH0072577/
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2701258/
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5602614/
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC1358332/
https://www.niddk.nih.gov/health-information/digestive-diseases/gallstones/definition-facts
http://www.americanjournalofsurgery.com/article/0002-9610(76)90295-6/abstract
https://www.kidney.org/kidneydisease/howkidneyswrk#howis
https://www.niddk.nih.gov/health-information/kidney-disease/kidney-failure/kidney-transplant
https://www.sciencedaily.com/releases/2015/05/150527124736.htm

Images:

http://www.thinkstockphotos.com/image/stock-photo-x-ray-of-brain-in-skull/dv385010
http://www.thinkstockphotos.com/image/stock-photo-3d-illustration-of-lungs-medical-concept/639399418
https://en.wikipedia.org/wiki/File:PneumonectomyXray.PNG
http://www.thinkstockphotos.com/image/stock-photo-3d-illustration-of-stomach/519081448
http://www.thinkstockphotos.com/image/stock-photo-human-spleen-anatomy/872739182
http://www.thinkstockphotos.com/image/stock-photo-3d-illustration-of-liver/524388994
https://en.wikipedia.org/wiki/File:Laparoscopic_Cholecystectomy_Incisions,_1_Week_Old.jpg
http://www.thinkstockphotos.com/image/stock-photo-3d-illustration-of-urinary-system/524387736