From the Book - Regular Print - 2nd ed.
What does Mars look like?
What is Mars' atmosphere like?
Has the Atmosphere of Mars changed over time?
What is the weather on Mars?
How does Mars compare with Earth?
What are the orbit and rotation of Mars like?
What is the surface of Mars like?
What is the largest canyon system on Mars?
What is the largest volcano on Mars?
What is the largest crater on Mars?
What are the Martian poles like?
How much water is on Mars today?
Are there pieces of Mars on Earth?
How many moons does Mars have?
Was Mars ever like Earth?
What were some early ideas about Mars?
How did Mars get its name?
Where is Mars in the night sky?
What space missions have studied Mars?
Will astronauts ever visit Mars?
Will people ever colonize Mars?
Could there be life on Mars?