Ross told BBC News that the polar bear killed the cub with sharp bites to the head, and once the bear spotted a boat, he became protective over his meal.
While this isn't the first time that a polar bear has been seen eating a fellow bear, there has been a noticeable increase in occurrences, "particularly on land where polar bears are trapped ashore, completely food-deprived for extended periods of time due to the loss of sea ice as a result of climate change," Ross told BBC News.
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