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Two-thirds of our planet's surface is covered with water. Every human being is made up of 80% water. Water is the source of life. However, water can also deprive humans of life. There are many rivers on Earth that pose a huge danger to humans. Some rivers are so violent that they can take a human life in a matter of minutes. Others are full of dangerous predators, such as anacondas or piranhas. And in today's video, you will learn about the most dangerous rivers in the world. #pandora_it