Mars Odyssey detected hydrogen on the martian surface to remarkably low altitudes.

The MER team discovered a large abundance of sulfure in the martian regolith.

The martian regolith seems very sticky with it clumping on the rover's wheels and based upon what they've seen in the trenches.

The material in the bottom of the trenches has a lighter color and no visible grain structure.

The Viking lander found that martian regolith would outgas when liquid water was added to it (G. Levin's famous false positive for life).

Venus is known to have lots of sulfuric acid in its atmosphere.

Sulfuric acid is a viscous fluid with a low vapor pressure.

The formula for sulfuric acid is H2SO4.

Nut theory for the day: Could the slow diffusion of sulfuric acid through the Martian regolith over millions of years create the river beds and other "aqueous" surface features of Mars observed from orbit?

Gary