Mercury is shrinking.
Relax, the solar system isn't going to drop to 8 planets any time soon. But Mercury is definitely getting smaller over time - it's shrunk about 8.6 miles over the last 4 billion years.
NASA is, as usual, being quite ridiculous. Turns out that Russian cosmonauts have been growing their own vegetables for quite a while...but, of course, NASA claims this isn't safe and they have to do a bunch of experiments first. Pencils, anyone?
Oh, and Happy St. Patrick's Day. Don't drink too much green beer.