They predate the dinosaurs and they outnumber us by trillions, yet you might not ever have the pleasure of seeing one. So let us introduce to you, the nematode. Hosted by: Hank Green 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: www.britannica.com/search?query=flatworms www.theatlantic.com/family/archive/2019/07/world-population-stop-growing/595165/ lifesciences.byu.edu/there-are-57-billion-tiny-wormlike-nematodes-for-every-human-on-earth entnemdept.ufl.edu/creatures/nematode/soil_nematode.htm phys.org/news/2019-07-nematodes-climate.html archive.lib.msu.edu/tic/bigga/gki/article/2012mar30.pdf www.theguardian.com/science/2016/sep/20/man-v-rat-war-could-the-long-war-soon-be-over books.google.com/books?id=d4GQlYzode8C&pg=PA24&lpg=PA24&dq=%22intestinal+roundworm%22+%2227000+eggs%22&source=bl&ots=l7CnU6OFyX&sig=ACfU3U1Ad3kt7-q-1lHM6_W0nHu-KPb20w&hl=en&sa=X&ved=2ahUKEwiOwcz4kofmAhUPHzQIHf_dBJkQ6AEwAHoECAIQAQ#v=onepage&q=%22intestinal%20roundworm%22%20%2227000%20eggs%22&f=false ucmp.berkeley.edu/phyla/ecdysozoa/nematoda.html www.ncbi.nlm.nih.gov/pmc/articles/PMC3789810/ www.nature.com/articles/srep17676 nematode.unl.edu/wormgen.htm www.ncbi.nlm.nih.gov/books/NBK26861/ www.wormbook.org/chapters/www_quicktourdiversity/quicktourdiversity.html sese.asu.edu/about/news/article/1498 esajournals.onlinelibrary.wiley.com/doi/full/10.1890/ES14-00319.1 onlinelibrary.wiley.com/doi/full/10.1111/j.1740-8709.2007.00127.x www.austincc.edu/ddingley/MLAB1331/LectureGuide/Nematode.pdf www.ncbi.nlm.nih.gov/pmc/articles/PMC4413787/ blogs.scientificamerican.com/artful-amoeba/parasitic-roundworms-own-this-place/ emedicine.medscape.com/article/224011-overview today.oregonstate.edu/archives/2011/apr/research-outlines-mysterious-evolution-nematodes-–-one-earth’s-first-animals phys.org/news/2011-04-outlines-mysterious-evolution-nematodes-.html web.archive.org/web/20131215144805/http://www.mactode.com/page21/files/Placentonema_gigantissima.pdf www.nhc.ed.ac.uk/index.php?page=24.25.333.369 www.encyclopedia.com/plants-and-animals/animals/zoology-invertebrates/nematoda www.ncbi.nlm.nih.gov/pubmed/17708982 www.wormbook.org/chapters/www_quicktourdiversity/quicktourdiversity.html www.ncbi.nlm.nih.gov/pmc/articles/PMC1855192/ www.yourgenome.org/facts/why-use-the-worm-in-research sustainability.asu.edu/news/archive/when-roundworms-lose-carbon-emissions-rise/ cbs.umn.edu/cgc/what-c-elegans www.people.ku.edu/~erikl/Lundquist_Lab/Why_study_C._elegans.html www.nature.com/scitable/topicpage/c-elegans-model-organism-in-the-discovery-464/ www.statnews.com/2018/08/20/lab-worm-c-elegans/ www.genome.gov/25520394/online-education-kit-1998-genome-of-roundworm-c-elegans-sequenced www.yourgenome.org/facts/why-use-the-worm-in-research www.natureasia.com/en/nmiddleeast/article/10.1038/nmiddleeast.2019.111 phys.org/news/2019-06-climate-affect-impact-roundworms-grasslands.html www.nature.com/articles/s41586-019-1418-6 www.medicinenet.com/rat_lungworm_angiostrongylus_cantonensis/article.htm www.infectiousdiseaseadvisor.com/home/decision-support-in-medicine/infectious-diseases/intestinal-nematodes-roundworm/ commons.wikimedia.org/w/index.php?sort=relevance&search=Strongyloides&title=Special%3ASearch&profile=advanced&fulltext=1&advancedSearch-current=%7B%7D&ns0=1&ns6=1&ns12=1&ns14=1&ns100=1&ns106=1#/media/File:Duodenum_Strongyloides_40x2.JPG www.cdc.gov/dpdx/thelaziasis/index.html www.farmcarbontoolkit.org.uk/toolkit/soil-carbon-emissions www.ncbi.nlm.nih.gov/pmc/articles/PMC5886223/ www.ncbi.nlm.nih.gov/pmc/articles/PMC358231/ www.cdc.gov/parasites/trichinellosis/index.html

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