Can’t Read This Headline? It’s Written in Invisible Ink
Embed Code (recommended way)
Embed Code (Iframe alternative)
Please login or signup to use this feature.

Think inconspicuous ink is children’ stuff? Science historian Kristie Macrakis’ new book Prisoners, Lovers, & Spies: The Story of unnoticeable Ink from Herodotus to al-Qaeda tells a unusual tale. Macrakis argues that for prisoners, lovers, and spies all through
history, communicating secretly was a substance of being and killing. She reveals the secrets of unnoticeable penning, from the smooth (lemon juice) to the compound (microdots).

Learn further at

Licence : All Rights Reserved