Mount Everest is about 60 million years old and the Amazon rainforest is only 10 million years old., The youngest sea in the world is the Baltic Sea., The Earth is always changing because of volcanoes, earthquakes and, of course, wind and rain., Eighty or more volcanoes are under the oceans and sometimes they become new islands., It's normal for our planet to change, but at the moment, scientists think it's changing faster than usual.

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