How do animals of the same species get to other landmasses like bears being in the Americas and Eurasia?
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What is today the Bering Strait and Bering Sea have in the past been land. It is called the Bering land bridge or [https://en.wikipedia.org/wiki/Beringia](https://en.wikipedia.org/wiki/Beringia)Last time it occurred was during the last ice age, the land connection disappear 11,000 years ago.
So there has been a land connection quite recently and many time before that between the continents. That land bridge is likly one way humans migrated to the new world too.
One thing to remember is during the winter you can get a ice connection between continents too. Not that often in Bering Strait because of the current but farther north. Here is a fox that walked from Spitsbergen to Canada https://www.argos-system.org/long-travel-of-arctic-fox-from-svalbard-to-canada/ It is not had to see that walking from Asian mainland to Novaya Zemlya and then Spitsbergen is quite possible for a fox.
Here is a map of how how the ice can extend. https://www.severe-weather.eu/global-weather/arctic-sea-ice-second-highest-18-years-end-2021-rrc/
So it is possible for animals to walk between Asia and America today. I am not saying bear migrated like that just that it is possible. That is bears that are not polar bears because they will move between contingent all the time.
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