Mars is the fourth planet from the sun.

The volume of water ice in the south polar ice cap, if melted, would be sufficient to cover the entire planetary surface to a depth of 11 meters (36 ft).

Jonathan Swift wrote about the two moons of Mars in Gulliver's Travels--151 years before they were discovered!

Dust storms on Mars can last for months and cover the entire planet.

Unlike most of the other Looney Tunes villains, Marvin the Martian is clever and competent.