Today is sol 167 on Mars. The weather report from sol 151 says there was a high of -46 C and a low of -89 C. (Fahrenheit and Celsius sales actually converge at -40 degrees, that is, -40 F is the same as -40 C.) That's cold.
Every journey we make to these far-flung, frozen landscapes ought to remind us of the uniqueness of Planet Earth. Nowhere within billions and billions of miles is there anyplace so habitable, so hospitable to life as we know it. No matter what we learn from Phoenix, and they'll be sorting through the stuff for months to come, we have to learn that our current home is all we've got. Let's do right by it.