A lead-based ink can be used to print invisible messages that become legible when decrypted with a chemical trigger. Conventional ‘invisible’ inks are not very secure, because they are easily read ...

IT’S 9:13. WE HAVE A NEW FUN FAMILY ACTIVITY FOR YOU IN THE SCIENCE OF IT. HERE’S FIRST WARNING METEOROLOGIST. ALEXI SHOWING US AN EXPERIMENT MIXING PAPER BAKING SODA AND FIRE. HELLO EVERYONE AND ...

(KERO) — People have seen it in spy movies, secret messages written through invisible ink. As it turns out, the average person may have all the ingredients needed to make their own invisible ink right ...

To make invisible ink, you only need a few ingredients - and a lot of patience! Grab a lemon and watch how it's done. Full-Time Kid is available to stream on pbs.org and the free PBS App, available on ...

Invisible inks based on “smart” fluorescent materials have been shining brightly (if only you could see them) in the data-encryption/decryption arena lately ...

WASHINGTON - The CIA lifted the lid on one corner of the cloak and dagger world of World War I, declassifying six of the oldest secret documents in the U.S. government archives, the agency announced ...

The CIA unearths some pretty interesting materials and this week it was touting the oldest once-classified documents in is collection. The mostly cryptic documents, from 1917 and 1918 describe secret ...