Animals in North America have a problem — they’re having a hard time moving around.

Migration is key for the survival of a lot of species. But in many places, developments like roads, highways, towns, industrial plants, or even entire cities form roadblocks that limit how far animals can move before they encounter humans in a potentially dangerous way. That's bad news on any day, but especially now that temperatures are on the rise. According to a study from the Proceedings of the National Academy of Science, only 41% of natural lands in the United States are connected enough to allow animals to trek safely toward cold enough habitats.

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Rocky Mountain Wolf Project

California is using its highway system to save lives.

Human lives, yes. But first ... bee lives.


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In 1914, it could take over 40 days to travel to remote places in the world.

That year, John G. Bartholomew — Great Britain’s royal cartographer at the time — published an isochronic map showing travel times from London to various places around the globe. "Isochronic" simply means that lines (isochrones) are drawn on the map between locations that could be reached in the same amount of time. Trips range from “within 5 days journey” to “over 40 days.”

Even at first glance, it’s stunning.

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