The contribution of the horse through human history is well documented. Whether as sources of food, transportation, or farm labour, the horse and humankind are forever linked. But did you ever wonder what made it possible for us to actually ride these animals? A new study might have the answer.

Published this month in the journal Nature, scientists found that approximately 4,200 years ago, one lineage of horse became dominant, which might be the proof needed to definitively state when humans began to share and sell domesticated horses around the world.

The article, called Widespread horse-based mobility arose around 2,200 BCE in Eurasia, suggests that this particular line of horses shared a genetic mutation that altered its back, a factor that could explain how and when people found it easier to ride.

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