And it's not just the earth that has variations. Since the Viking spacecraft reached Mars in the 1970's until recent readings were taken, the average temperature on Mars has risen 1.1 degrees Fahrenheit just as the average temperature on the earth has risen. Since human industrialization is probably not to blame for the change on Mars, other causes are being considered. The scenario most postulated is dust storms.<ref>http://www.space.com/scienceastronomy/070404_gw_mars.html</ref> | And it's not just the earth that has variations. Since the Viking spacecraft reached Mars in the 1970's until recent readings were taken, the average temperature on Mars has risen 1.1 degrees Fahrenheit just as the average temperature on the earth has risen. Since human industrialization is probably not to blame for the change on Mars, other causes are being considered. The scenario most postulated is dust storms.<ref>http://www.space.com/scienceastronomy/070404_gw_mars.html</ref> |