Scientist says that there were more water on mars than expected.

LOS ANGELES, California (Reuters) — The hills of Mars yielded more tantalizing clues about how water shaped the Red Planet in tests by NASA’s robotic geologist, Spirit, while its twin, Opportunity, observed the deep crater it climbed into two months ago, scientists said on Wednesday.

“This is different from the rocks out on the plain, where we saw coatings and veins apparently due to effects of a small amount of water. Here we have a more thorough, deeper alteration, suggesting much more water.”

Although we spend billions of tax dollars (sorry, $820 million combined cost) on a project like Opportunity and Spirit, I think it is worthwhile to explore outside of our own planet. Maybe we can then find answers to unsolved questions or maybe we find more technical advances.