Wow, 3 posts in a day! I can’t remember the last time that happened. Please do not click this link if you can’t afford to be distracted for at least an hour. It requires Flash, but is completely worth it. The last two holes are even worse than the volcano-of-death that is the last hole at most mini-golf courses.
Back to short linky goodness for a second…I just found this on bling. It starts you with a view of the Milky Way at 10 million light years from Earth, then moves you toward Earth at sucessive orders of magnitude until you are looking at the proton of a carbon atom in a tree leaf somewhere in Tallahassee. It goes pretty fast on the “Auto” setting, so try clicking on the Manual button and step through it at your own speed. A wonderful piece of imagination and science—makes me wish I’d had more time to spend at the Exploratorium the last time I was in San Francisco.