text: It's a great way to assume how it happened by comparing Mars to Earth, but it could also be irrelevent. Earth, unlike Mars, has an atmosphere. It keeps in heat, but changes. Earth also has water and life. If this were to be a cause of the rocks, hills, and mountains, then it could be said that the face on Mars was not created by erosion, water, or anything like that. It takes a lot of studing and even more knowledge to figure it out, but aliens don't seem to be logical quite yet.The author does not back their idea that studying Venus is worthy of pursuit. The author only has 3 paragraphs that supports their idea out of 8. The problem the author has is that there is not enough reason to go to venus besides curiosity.