Mercury, the closest planet to the sun has temperatures ranging from 400 degrees C on the surface to -170 degrees C in some permanently shadowed craters.

I was just about to go to sleep when I remembered that my biology class is having a quiz tomorrow and I should post a hint to an extra credit question. Rather than post it here, I’ll refer you to the Nature.com site that has extraordinary new data about a newly identified water reservoir in our solar system.

Follow this link to Nature’s news story about the finding.