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“It’s pretty promising. We’re able to get closer than I’d expect,” says Michael Sama, a biosystems engineering professor at the University of Kentucky. “[We can be] 20 or 30 feet away and it doesn’t affect them in any way whatsoever.” The animals also appear to become acclimated to machines flying at these altitudes over time. But at a height of around 8-12ft (2.4-3.7m), the UAVs are able to compel the cows to move so they can be more easily rounded up, another facet the team is beginning to study.

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