It only takes twenty generations of selective breeding to create large differences or appearance and behavior in other mammals.


The Happiness Hypothesis: Putting Ancient Wisdom to the Test of Modern Science (ed. Random House, 2015) - ISBN: 9781448166688


It only takes twenty generations of selective breeding to create large differences or appearance and behavior in other mammals.

It only takes twenty generations of selective breeding to create large differences or appearance and behavior in other mammals.

It only takes twenty generations of selective breeding to create large differences or appearance and behavior in other mammals.

It only takes twenty generations of selective breeding to create large differences or appearance and behavior in other mammals.