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By Kimberly Solis
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Comments (29)
There are so many fascinating things in this world lying right beneath our eyes that we haven't discovered yet. I wonder what secrets scientists will uncover next!
Who would think of putting parchment paper under a UV ray? People are so smart these days- lol
how do they rub the ink out?
wow they have some advanced technology
How did they do that? I want to know more!
so cool!
WOW awesome rit.
that is so interesting...
that i super cool
How did they use invisible ink back then?
I was just wondering that!
I'm pretty sure lemon juice can be use as an "invisible ink", not sure if ancient civilizations knew that back then though
That's true, just so you know for sure
I think they did