text: Venus was once covered by oceans years ago. Another reason why sciantists want to study Venus is because Venus was once covered with bodies of water and want to see why that changed. In the passage it said that " Long ago, Venus was probably covered largely with oceans and could have supported various forms of life, just like earth" (paragraph 4, sentence 3). This means that they are really fasinated by the way that Venus just went from being bodies of water to having eruptions of volcanoes all the time and earthquakes, and lightning strikes. All these stuff have changed Venus completly and they want to figure out why.