8,000 Year-Old Petroglyph might be the World's Oldest Image of Hunting Dogs, complete with Leashes

Researchers have found what may be the earliest depiction of dogs hunting alongside a human companion in Saudi Arabia, in a sandstone carving believed to be more than 8,000 years old. The human is armed with a bow and arrow, accompanied by thirteen dogs, including two that appear to be tethered to their biped counterpart by what the researchers believe are leashes -- possibly the oldest record of the use of such a restraining device by humans.

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