Short answer: Polar bears are generally bigger and more specialized sea-ice hunters; grizzlies (brown bears) are typically stronger all-rounders on land with the broader tool-kit (digging claws, omnivorous diet, huge territorial confidence). Who’s “tougher” depends entirely on where they meet.Qui...
1、African elephantAfrican elephants are the largest land mammals, and males and females are dimorphic (both sexes differ in shape or physical characteristics). An adult African male elephant is taller than 3.5 meters, and can reach up to 4.1 meters. Weighing approximately 2.7 to 6 tons, females are...