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

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
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