상세정보
VOLCANOES ARE ONE OF NATURE'S GREAT WONDERS. FOR YEARS THEY CAN STAND DORMANT, BUT ONCE ACTIVE THEY CAN ERUPT IN TREMENDOUS EXPLOSIONS OF POWER. SOME ERUPTIONS ARE SO BIG, THEY CHANGE THE EARTH'S CLIMATE. LUCKILY, GEOLOGISTS CAN NOW APPROXIMATE WHEN AN ERUPTION WILL OCCUR....
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