New evidence uncovered in east Africa indicates ancient hominins began crafting tools from animal bones far earlier than ...
Do elephants and hippos get along? Watch what happens when a herd of elephants encounters a sleeping group of hippos.
Hippos are the world's second-largest land mammals after elephants, measuring about 11 feet (3.5 meters) long and about 5 feet (1.5 meters) tall, according to International Fund for Animal Welfare.
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