Episode 68 - Evolution of Eyes

If you’re reading this, there’s a very good chance you’re using one of the most incredible tools in the animal toolkit: the eye! In this episode, we discuss what’s known – and what’s suspected – about the incredible evolutionary history of the eye. How many types of eyes are there? What is an eye, anyway? Just how difficult is it to evolve something so intricate and complex?  All this and more! In the news: a giant parrot, a giant penguin, ancient RNA, and crinoid rafts. Time markers: Intro & Announcements: 00:00:00News: 00:05:00Main discussion, Part 1: 00:32:00Main discussion, Part 2: 01:09:00 Check out our blog for bonus info and pictures:http://commondescentpodcast.wordpress.com/ We're going to be at DragonCon 2019! The Common Descent Store is open! Get merch! http://zazzle.com/common_descent Follow and Support us on: Patreon: https://www.patreon.com/commondescentpodcast Twitter: https://twitter.com/CommonDescentPCFacebook: https://www.facebook.com/commondescentpodcast/PodBean: https://commondescentpodcast.podbean.com/ iTunes: https://itunes.apple.com/us/podcast/the-common-descent-podcast/id1207586509?mt=2YouTube: https://www.youtube.com/channel/UCePRXHEnZmTGum2r1l2mduw The Intro and Outro music is “On the Origin of Species” by Protodome. More music like this at http://ocremix.org. Muscial Interludes are "Professor Umlaut" by Kevin MacLeod (incompetech.com). Licensed under Creative Commons: By Attribution 3.0http://creativecommons.org/licenses/by/3.0/