Scientists preferred newer models. New evidence caused revisions. The newer models were easier to draw. The information was finally put in books.
Early Egyptians thought the solar system was a rectangular box. People in early Greece pictured the universe as a set of crystal-like spheres. Later the solar system was viewed as a set of planets orbiting the Sun. Why has the model of the solar system changed over the centuries?

Options:
- Scientists preferred newer models.
- New evidence caused revisions.
- The newer models were easier to draw.
- The information was finally put in books.

New evidence caused revisions.