Greek and Roman Lap Dogs
According to the Greek scholar Callimachus, the lap dogs were "chiefly sought after for the amusement and pleasure of women. ... That kind of dog is altogether useless for any purpose, except that they ease pain of the stomach being often applied to it." These dogs can be seen accompanying their owners in ancient art.
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from Earth Unplugged
Key Facts In This Video
The first dogs were wolves that grew accustomed to scavenging from humans. (0:51)
In Russia, silver foxes have been domesticated through selective breeding. (1:48)
To be domesticated, an animal must have a varied diet and a short lifespan. (2:37)