Physical Characteristics
Mars has only a quarter the surface area of the Earth and only one-tenth the mass, though its surface area is approximately equal to that of the Earth's dry land because Mars no longer possesses oceans. The solar day on Mars is very close to Earth's day: 24 hours, 39 minutes, and 35.244 seconds.
Read more about this topic: Mars In The Fiction Of Leigh Brackett
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“Vanity of science. Knowledge of physical science will not console me for ignorance of morality in time of affliction, but knowledge of morality will always console me for ignorance of physical science.”
—Blaise Pascal (1623–1662)