Speciation: Of Ligers & Men - Crash Course Biology #15

2012-05-07

[public] 1.42M views, 16.0K likes, 261 dislikes audio only

Hank explains speciation - the evolutionary process by which new biological species arise - in terms of finches, ligers, mules, and dogs.

Table of Contents

1) Species 0:30

2) Hybrids 1:52

3) Reproductive Isolation 2:48

a) Post-Zygotic 3:31

b) Pre-Zygotic 3:51

4) Allopatric Speciation 4:23

5) Sympatric Speciation 6:03

6) Biolography 6:32

7) Dogs 8:37

This video contains the following sounds from Freesound.org:

"bird tweet.aif" by tigersound

"ForestBirds.wav" by HerbertBoland

"morning_in_the_forest_2007_04_15.wav" by reinsamba

"AMBIENT LOOP - Perfectly Clear - Wilderness Hillside - FILTERED.mp3" by Arctura

"oceanwavescrushing.wav" by Luftrum

Crash Course is on Patreon! You can support us directly by signing up at http://www.patreon.com/crashcourse

Want to find Crash Course elsewhere on the internet?

Facebook - http://www.facebook.com/YouTubeCrashCourse

Twitter - http://www.twitter.com/TheCrashCourse

Instagram - https://www.instagram.com/thecrashcourse/

CC Kids: http://www.youtube.com/crashcoursekids