|Photo Courtesy: Smithsonian|
It's like a personal behind-the-scenes tour of the collection. Only with this tour you also make the discoveries!
Our sister site OpenScientist just did a full review and even has great directions for getting involved. It really seems easy for most people; the toughest part is just reading some of the messy handwriting used by those early writers (now I understand why my own teachers used to stress handwriting so much!). So if you have any interest I definitely recommend checking it out.