I was unaware that NASA had a picture of the day until yesterday, although they date back 17 years. Yesterday's was an interactive flash animation on the scale of the universe. By moving the scroll bar across the bottom, you can explore a diversity of sizes and clicking on different items will bring up descriptive information. If you are anything like us, this trumps all lesson plans for the day, because you could easily spend hours days on this animation. Check it out by clicking the link above!