John R. Quain, writing at American Photo:

When the hyperspectral eye was turned on an early draft of the Declaration of Independence written in Thomas Jefferson’s hand, researchers could see that Jefferson had originally written the word “subjects” on one line, which he then scratched out and replaced with the more politically correct “citizens,” exemplifying the egalitarian sensibility of one of the Enlightenment’s greatest minds.

Okay, that is the most fascinating tech I will see this month. Read the whole article. It’s, well, fascinating.