One possible explanation for the absence of liquid water on the surface of the planet is that Mars, which unlike Earth does not have a protective magnetic field, is being shorn of its surface by the solar wind. An estimated 100,000 kilograms per day of Mars surface material is blown off the planet, according to Stas Barabash, lead scientists for the Mars Express ASPERA-3 experiment, which measures the phenomenon.---Quarter of Mars Scientists at European Meeting Believe Life Possible on Red Planet
I should post the whole article as a separate thread but I'm too lazy.
Anyway, that's pretty bizarre, that Mars is being blown away. I never knew that.
Wait I am sure Mars is being blown away by eco-damage caused by humans, right?