These large balls of white fluff may look cute and cuddly, but they’re much more dangerous than you think. If you happen to spot a polar bear, keep it in the distance. They’ll keep to themselves, unless they’ve been provoked, or need food. They have sharp teeth and claws that’ll shred a human being to bits. Polar bear attacks on humans have been on the rise, with more than 20 attacks on humans occurring in recent years (via Best Life Online).