text: The author provides copious reasoning on why Venus is a planet well worth studying, but his primary argument is that Venus may have been the planet most similar to Earth at one point. This is a valuable point in the author's argument because it explains the similarities between Venus and the Earth, regardless that these similarities may be firmly in the past. For example, Venus may have supported life just as Earth does. Venus also has some features similar to those on Earth, such as mountains, craters, and valleys. These are important points, because the more similar a planet is to Earth, the easier it will be to survive there. This argument's aim is to show the reader that exploring Venus is a goal that could be beneficial to humanity in the future.