We spend a huge portion of our lives sleeping. For us and other animals, it’s clearly a very important behavior. And yet, despite how familiar and commonplace it is, there’s plenty we still don’t understand about sleep: its origins, evolution, and even how to define it in the first place. In this episode, we explore some of the remarkable variation in animal sleeping habits, we discuss some of the ways we study and understand sleep, and we touch upon the crucial – and much debated – question of what sleep even does for us anyway. In the news: early monotremes, chunky dunk, Permian pollinators, and parasitic ant mutations. Time markers:Intro & Announcements: 00:00:00News: 00:05:00Main discussion, Part 1: 00:40:00Main discussion, Part 2: 01:20:30Patron question: 02:16:00 Check out our blog for bonus info and pictures:http://commondescentpodcast.com/ Join us on Patreon to support the podcast and enjoy bonus content! https://www.patreon.com/commondescentpodcast Follow this link for a 30-day free trial to Audible!www.audibletrial.com/CommonDescent Or make a one-time donation via PayPal: https://tinyurl.com/4c68u4hp Find merch at the Common Descent Store! http://zazzle.com/common_descent Join the Common Descent Discord server! https://discord.gg/CwPBxdh9Ev Follow and Support us on:Twitter: https://twitter.com/CommonDescentPCFacebook: https://www.facebook.com/commondescentpodcastInstagram: @commondescentpodcast YouTube: https://www.youtube.com/channel/UCePRXHEnZmTGum2r1l2mduwPodBean: https://commondescentpodcast.podbean.com/ iTunes: https://itunes.apple.com/us/podcast/the-common-descent-podcast/id1207586509?mt=2 You can email us at commondescentpodcast(at)gmail.comOr send us physical mail at:The Common Descent Podcast1735 W State of Franklin Rd. Ste 5 #165Johnson City, TN 37604 The Intro and Outro music is “On the Origin of Species” by Protodome. More music like this at http://ocremix.org. Musical Interludes are "Professor Umlaut" by Kevin MacLeod (incompetech.com). Licensed under Creative Commons: By Attribution 3.0http://creativecommons.org/licenses/by/3.0/