Why Are Periodical Cicadas So. .. Periodical

Certain cicada species in North America emerge from the ground by the millions every 13 or 17 years. But why those specific intervals Are cicadas secretly primenumberloving mathematicians SciShow is supported by Go to to get 20 off of an annual Premium subscription. Hosted by: Michael Aranda SciShow has a spinoff podcast It s called SciShow Tangents. Check it out at Support SciShow by becoming a patron on Patreon: Huge thanks go to the following Patreon supporters for helping us keep SciShow free for everyone forever: Alisa Sherbow, Silas Emrys, Drew Hart. Jeffrey Mckishen, James Knight, Christoph Schwanke, Jacob, Matt Curls, Christopher R Boucher, Eric Jensen, Adam Brainard, Nazara, GrowingViolet, Ash, Sam Lutfi, Piya Shedden, KatieMarie Magnone, charles george, Alex Hackman, Chris Peters, Kevin Bealer, Jason A Saslow Looking for SciShow elsewhere on the internet Facebook: Twitter: Tumblr: Instagram: Sources: Images: