While hippopotamuses and rhinoceroses may look similar, they are very different creatures. Hippos spend much of their time in slow-moving rivers. Rhinos, depending on their species, live in grasslands, floodplains, swamp... More »

Hippopotamuses are mammals, while crocodiles are reptiles. Although both of these animals spend the majority of their lives in the water, each creature has characteristics that make them very different from one another, ... More »

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Baby hippopotamuses, which are more commonly known as calves, are born underwater and typically weigh in somewhere between 50 and 110 pounds and are about 4 feet long at birth. Because they are mammals that are born unde... More »

The larger of the two hippopotamus species can weigh up to 4,500 kilograms, or 9,912 pounds, and can measure over 16 feet long. The pygmy hippopotamus is much smaller, with a maximum weight of about 275 kilos, or 605 pou... More »

Although they spend much of their time in the water, hippopotamuses are one of the few animals unable to swim. Their inability to swim is partially due to their density. Instead, they walk or gallop along the bottom of t... More »

The most well-known animals native to Africa include African elephants, rhinoceroses, hippopotamuses, gazelles, crocodiles, cheetahs, hyenas and lions. The continent is also home to hundreds of unique bird species and th... More »

Large animals, such as whales, elephants, rhinoceroses, hippopotamuses, okapi and giraffes, use infrasound. Infrasound a frequency below 20 Hz that humans cannot hear, but several species of animals can produce and react... More »