Sometimes an animal long thought to be extinct reappears decades or centuries later, shocking scientists! Join Hank Green for a look at seven species that we thought were gone forever... but are back to (hopefully) stay for good! We're conducting a survey of our viewers! If you have time, please give us feedback: https://www.surveymonkey.com/r/SciShowSurvey2017 Hosted by: Hank Green ---------- Support SciShow by becoming a patron on Patreon: https://www.patreon.com/scishow ---------- Dooblydoo thanks go to the following Patreon supporters: Kelly Landrum Jones, Sam Lutfi, Kevin Knupp, Nicholas Smith, Inerri, D.A. Noe, alexander wadsworth, سلطان 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 ---------- Looking for SciShow elsewhere on the internet? Facebook: http://www.facebook.com/scishow Twitter: http://www.twitter.com/scishow Tumblr: http://scishow.tumblr.com/ Instagram: http://instagram.com/thescishow ---------- Sources: http://vertebrates.si.edu/fishes/coelacanth/coelacanth_wider.html https://www.wired.com/2015/03/creature-feature-10-fun-facts-coelacanth/ https://www.smithsonianmag.com/science-nature/dna-sequencing-reveals-that-coelacanths-werent-the-missing-link-between-sea-and-land-25025860/?no-ist http://www.nytimes.com/2005/05/12/science/oddball-rodent-is-called-new-to-science.html https://bdj.pensoft.net/article/4188/ http://news.bbc.co.uk/2/hi/science/nature/5082264.stm https://www.britannica.com/animal/monoplacophoran https://link.springer.com/article/10.1007/s12052-009-0125-4 https://www.tmsi.nus.edu.sg/files/05_Lim_Pg%2049-56.pdf https://www.nparks.gov.sg/mygreenspace/issue-11-vol-4-2011/conservation/a-marine-marvel-the-return-of-neptune-s-cup https://www.gov.sg/~/sgpcmedia/media_releases/nparks/press_release/P-20170527-2/attachment/3%20Factsheet%20B%20-%20Species%20recovery%20programme.pdf https://www.researchgate.net/publication/272509505_The_recovery_programme_for_the_Mallorcan_midwife_toad_Alytes_muletensis_An_update http://www.zoobarcelona.cat/en/mallorca-midwife-toad https://www.thebhs.org/projects/21-the-mallorcan-midwife-toad-recovery-programme http://www.smh.com.au/video/sponsors/the-stick-insect-with-the-luxury-pad-at-melbourne-zoo-20170907-gyd2n6.html https://theconversation.com/australian-endangered-species-lord-howe-island-stick-insect-11789http://www.npr.org/sections/krulwich/2012/02/24/147367644/six-legged-giant-finds-secret-hideaway-hides-for-80-years http://www.anoleannals.org/2012/05/31/rediscovery-of-the-enigmatic-ecuadorian-horned-anole/ http://www.bbc.com/earth/story/20160720-the-strange-reason-why-the-pinocchio-lizard-has-a-long-nose http://www.tandfonline.com/doi/full/10.1080/00222933.2017.1332790 Images: https://en.wikipedia.org/wiki/File:Amonite_Cropped.jpg https://en.wikipedia.org/wiki/File:Edwards%27_Dodo.jpg https://en.wikipedia.org/wiki/File:Undina_penicillata.jpg https://www.flickr.com/photos/sybarite48/5246927772/ https://en.wikipedia.org/wiki/File:Latimeria_menadoensis.jpg https://en.wikipedia.org/wiki/File:Pectoral_fin_Latimeria_chalumnae.jpg https://commons.wikimedia.org/wiki/File:Coelacanth_model,_Devonian_-_Houston_Museum_of_Natural_Science_-_DSC01709.JPG https://en.wikipedia.org/wiki/File:Marbled_lungfish_1.jpg https://en.wikipedia.org/wiki/File:Laonastes_aenigmamus_-_young_male_JP_Hugot_PLOS_ONE.jpg https://commons.wikimedia.org/wiki/File:LocationLaos.svg https://commons.wikimedia.org/wiki/File:07_Near_Phan_Ya_In_cave_-_panoramio.jpg https://commons.wikimedia.org/wiki/File:Neopilina.jpg https://commons.wikimedia.org/wiki/File:Cahuita_(6216305626).jpg https://commons.wikimedia.org/wiki/File:Common_limpets1.jpg https://en.wikipedia.org/wiki/File:Pilina_unguis.jpg https://en.wikipedia.org/wiki/File:Neptune%27s_Cup.jpg https://en.wikipedia.org/wiki/File:Alytes_muletensis.JPG https://en.wikipedia.org/wiki/File:Lord_Howe_Island.PNG https://en.wikipedia.org/wiki/File:Lord_Howe_ISS006-E-5731.png https://commons.wikimedia.org/wiki/File:Dryococelus_australis_male_%26_female.jpg https://commons.wikimedia.org/wiki/File:Lord_Howe_Island_stick_insect_Dryococelus_australis_10June2011_PalmNursery.jpg https://en.wikipedia.org/wiki/File:Dryococelus_australis_02_Pengo.jpg https://en.wikipedia.org/wiki/File:Anolis_proboscis_(7269935746).jpg https://en.wikipedia.org/wiki/File:Number-2-pencil.jpg