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The genus was described in 2005 to encompass species of hippos that were previously grouped in Hexaprotodon. Archaeopotamus means "the ancient of the river". Of all identified hippos, only Kenyapotamus is older. Kenyapotamus, however, is only known from partial fossils; Archaeopotamus is the oldest well-identified hippo. [1]
Small boats can easily be capsized by hippos and passengers can be injured or killed by the animals, or drown in the water. In one 2014 case in Niger, a boat was capsized by a hippo and 13 people were killed. [103] Hippos will often raid farm crops if the opportunity arises, and humans may come into conflict with them on these occasions.
Over prolonged periods, hippos can divert the paths of swamps and channels. [59] Adult hippos move at speeds up to 8 km/h (5 mph) in water; typically resurfacing to breathe every three to five minutes. The young have to breathe every two to three minutes. [12]: 4 The process of surfacing and breathing is automatic. A hippo sleeping underwater ...
Similar formations have also been found in sea-cow, lemur and hippopotamus, but the objects found in the amnion and allantois are distinguishable. [1] This has caused the confusion over the word "hippomanes" in scientific literature, with propositions to use it only for objects found in Equidae pregnancies.
Even the king of the jungle can have a bad day when trying to cross a river guarded by an aggressive hippo. Three lions found out the hard way that this river crossing was a giant hippo’s territory.
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Hippopotamidae is a family of stout, naked-skinned, and semiaquatic artiodactyl mammals, possessing three-chambered stomachs and walking on four toes on each foot. While they resemble pigs physiologically, their closest living relatives are the cetaceans.
Hippos, a related group with similar adaptations, are aggressive herbivores which can open their jaws up to 150 degrees and display enlarged canines in order to intimidate rivals. Male hippos engage in head-to-head "yawning" and jaw-wrestling contests, while females attack by approaching from the side and slamming their head into the opponent's ...