[My2Cents]

I wonder if humans, and not the sun, are responsible for the retreating snow pack on the southern pole of Mars, as tracked by the orbital surveyor since 1997.

[Dave Olson]

I wonder if humans, and not the sun, are responsible for the retreating snow pack on the southern pole of Mars, as tracked by the orbital surveyor since 1997.

Nope. It's from little green men driving around in their Martian SUV's.

[cogitator]

I wonder if humans, and not the sun, are responsible for the retreating snow pack on the southern pole of Mars, as tracked by the orbital surveyor since 1997.

Neither.

Global warming on Mars?

[muawiyah]

Not humans, but their SUVs