NASA scientists have discovered evidence of water flowing on Mars. Photo evidence shows that water has come to the surface from underground sources and followed gravity down the sides of craters and through valleys.
This was substantiated by a bill received from Roto-Rooter for repairs of a leak caused by the Mars Rover running over and breaking a pipe and a sprinkler head. Property owners had the bill forwarded to NASA because it was their vehicle that caused the damage.
"You know what they say," said plumber Dave Diemos, "you break it, you buy it!"
As there were no local repairmen that could be called, the space agency admits that the bill was rather large due to the mileage cost of the plumbers.
In related NASA stories, they have also discovered solid matter coming from Uranus and what appear to be urine stains on Pluto.