from the best-discoveries-by-accident dept.
The rover Spirit has been dragging one wheel around the surface of Mars for some time. One of the resulting gouges revealed a mineral deposit which was probably caused by a hydrothermal vent. This implies a large amount of water was present when the vent was active.
e-credibility: the non-guaranteeable likelihood that the electronic data
you're seeing is genuine rather than somebody's made-up crap.
- Karl Lehenbauer