Wood-eating Clams: The Real Kraken?

For thousands of years, a sea creature has plagued sailors by attacking and devouring their ships. It is so destructive that reportedly it swiss-cheesed the hulls of Christopher Columbus’s ships, sinking at least two of them.Hosted by: Hank GreenSciShow has a spinoff podcast! It's called SciShow Tangents. Check it out at http://www.scishowtangents.org----------Support SciShow by becoming a patron on Patreon: https://www.patreon.com/scishow----------Huge thanks go to the following Patreon supporters for helping us keep SciShow free for everyone forever:Chris Peters, Matt Curls, Kevin Bealer, Jeffrey Mckishen, Jacob, Christopher R Boucher, Nazara, charles george, Christoph Schwanke, Ash, Silas Emrys, KatieMarie Magnone, Eric Jensen, Adam Brainard, Piya Shedden, Alex Hackman, James Knight, GrowingViolet, Drew Hart, Sam Lutfi, Alisa Sherbow, Jason A Saslow----------Looking for SciShow elsewhere on the internet?Facebook: http://www.facebook.com/scishowTwitter: http://www.twitter.com/scishowTumblr: http://scishow.tumblr.comInstagram: http://instagram.com/thescishow----------Sources:https://www.smithsonianmag.com/science-nature/tunneling-clam-bedeviled-humans-sank-ships-conquered-oceans-180961288/https://www.britannica.com/animal/shipwormhttps://academic.oup.com/femsec/article/82/3/616/491182https://www.livescience.com/45027-wood-falls-teem-with-life.htmlhttps://royalsocietypublishing.org/doi/10.1098/rspb.2019.0434https://www.biorxiv.org/content/10.1101/826933v2.full.pdfhttps://www.rmg.co.uk/stories/blog/library-archive/musing-on-mollusc-brunels-inspiration-thames-tunnelhttps://www.pnas.org/content/114/18/E3652https://blogs.scientificamerican.com/artful-amoeba/the-giant-shipworm-revealed-at-last-video/https://craigmcclain.com/?page_id=423Images:https://www.istockphoto.com/vector/shipwreck-gm1245909125-363120756https://www.istockphoto.com/vector/ships-of-columbus-engraving-1895-gm1135116615-301860971https://commons.wikimedia.org/wiki/File:Shipworm.jpghttps://www.storyblocks.com/video/stock/waves-crash-onto-rocky-beach-with-driftwood-tropical-caribbean-bw1b3yfdhk0zzina4https://www.istockphoto.com/photo/log-burrowed-by-pacific-shipworm-on-gabriola-island-british-columbia-gm485294621-38598262https://www.istockphoto.com/vector/shipworm-gm184872981-18331056https://www.eurekalert.org/multimedia/pub/138165.php?from=356197https://www.storyblocks.com/video/stock/vertical-aerial-drone-view-flying-over-namafjall-hverir-sulphur-mud-hot-pots-in-iceland-s_uf8smoxjnbmgb4rhttps://www.istockphoto.com/photo/pond-gm521114709-50146058https://www.eurekalert.org/multimedia/pub/138076.php?from=356197https://www.flickr.com/photos/51647007@N08/5014973927