What Biologists Do: Crash Course Biology #3

A biologist’s natural habitat is anywhere questions about life are being asked—whether the subject is a nematode or a narwhal, a single cell, or a whole ecosystem. In this episode of Crash Course Biology, we’re flipping the microscope around to show how biologists’ work goes down. Along the way, we’ll learn why zebrafish and fruit flies are some of biology’s next top models. Chapters: Studying Life 00:00 Your Local Biologist 1:20 Biologists At Work 3:05 Real Life Biologists 5:17 Model Organisms 8:49 Review & Credits 11:10 This series was produced in collaboration with HHMI BioInteractive, committed to empowering educators and inspiring students with engaging, accessible, and quality classroom resources. Visit for more information. Sources: *** Watch our videos and review your learning with the Crash Course App! Download here for Apple Devices: Download here for Android Devices: Crash Course is on Patreon! You can support us directly by signing up at Thanks to the following patrons for their generous monthly contributions that help keep Crash Course free for everyone forever: Katie, Tori Thomas, DL Singfield, Ken Davidian, Stephen Akuffo, Toni Miles, Steve Segreto, Kyle & Katherine Callahan, Laurel Stevens, Burt Humburg, Allyson Martin, Aziz Y, Perry Joyce, Scott Harrison, Mark & Susan Billian, Alan Bridgeman, Rachel Creager, Breanna Bosso, Matt Curls, Jennifer Killen, Jon Allen, Sarah & Nathan Catchings, team dorsey, Trevin Beattie, Eric Koslow, Jennifer Dineen, Indija-ka Siriwardena, Jason Rostoker, Siobhán, Ken Penttinen, Nathan Taylor, Les Aker, William McGraw, ClareG, Rizwan Kassim, Constance Urist, Alex Hackman, Pineapples of Solidarity, Katie Dean, Stephen McCandless, Wai Jack Sin, Ian Dundore, Justin, Mark, Caleb Weeks. __ Want to find Crash Course elsewhere on the internet? Facebook - Twitter - Instagram - CC Kids: