![]() ![]() Plays into debate about mustangsĭomestic horses come from wild horses in Europe and Asia. ![]() ![]() Genetic approaches could in fact help hypothesize when it was accessible,” Heintzman says. But the period from 100 000 years to a million years ago is still much more open to discussion. “Over the last 100 000 years, we have a pretty good idea of when the land bridge existed. The land bridge occurred during ice ages and cold periods during the last one million years, when glaciers held on to a lot of water.Įxactly when it was possible to get over the bridge is still being debated. “This finding indicates that North American and Eurasian horses were basically the same species.” They weren’t totally isolated from each other,” says Heintzman. But not only that, they intermingled as well. “We found out that the populations of horses travelled across the land bridge when it existed. The land bridge connected Siberia and Alaska. This connectivity was possible when the ocean level was low, creating a land bridge where the Bering Strait is today. ![]()
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