A Very Handy Fish Fossil

This week, scientists discover something in a fish fossil that might give us a hand in finding our earliest landdwelling ancestors. Go to to try their Calculus in a Nutshell course. The first 200 subscribers get 20 off an annual Premium subscription. Hosted by: Hank Green 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: Kevin Bealer, Jacob, KatieMarie Magnone, D. A. Noe, Charles Southerland, Christopher R Boucher, Alex Hackman, Matt Curls, Adam Brainard, Scott Satovsky Jr, Sam Buck, Avi Yashchin, Ron Kakar, Chris Peters, Kevin Carpentier, Patrick D. Ashmore, Piya Shedden, Sam Lutfi, charles george, Greg Looking for SciShow elsewhere on the internet Facebook: Twitter: Tumblr: Instagram: Sources: