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I’d say a polar bear. A polar bear has been known to attack and eat its own cubs, whereas a lion only kills the young from a different pride. Mercilessness and cruelty help when attacking others.

Polar bear excursions hosted in the region have also removed the wild animal's fear of humans, Mr Kidlapik alleged on Twitter, potentially resulting in more attacks on humans.

A polar bear has killed a man in Norway's Arctic Spitsbergen island, local officials say. The attack occurred at a campsite near Longyearbyen, the main town of the island in the Svalbard archipelago.

Yet even Rickard had never seen a bear kill. Our expedition leader, Dutchman Rinie van Meurs, author of The Future Polar Bear, The Impact of Vanishing Sea Ice on an Arctic Ecosystem, who can spot ...