Even though Mars is much smaller than Earth, because it has no bodies of water, its land area is 56 million square miles, almost equal to equal to Earth's, 57.5 million square miles. Mars's highest peak, is also the largest known volcano in the solar system, 79,000 ft, compared to Earth's Mt. Everest at 29,020 ft.
Because of its orbit, a year on Mars takes 66.9 Earth days. A day on Mars, is 24 hours, 37 minutes, it is almost the same as Earth's, 24 hours.
The temperature on Mars is just too cold for creatures of the Earth. Temperature range from -128° F in the summer to -220° F in the winter.
Mars has an atmosphere that is 95% carbon dioxide, 2.7% nitrogen and 1.6% argon. Although, as we mentioned previously, it is extremely cold, an astronaut stepping out without protection would suffocate even faster than they would freeze.
Mars has two tiny moons. Phobos orbits only 3,718 miles above Mars. Astronomers predict in about 100 million years, the effect of gravity will plunge it to Mars's surface. Deimos gravity is so weak, if a person was able to run 7 miles/hour along it's surface, they would reach Escape Velocity and could lift into space.