Hippopotamuses, often called hippos, are large, mostly herbivorous mammals native to sub-Saharan Africa. They are known for their massive size, with adults weighing between 3,000 to 8,000 pounds. Hippos spend much of their time in water, which helps keep their bodies cool under the hot sun. They are social animals, usually found in groups called pods. Despite their seemingly docile nature, hippos are considered one of the most dangerous animals in Africa. They have powerful jaws and sharp teeth, which they use for defense. Hippos are also known for their unique skin, which secretes a natural sunscreen that protects them from sunburn and dehydration.