Invisible Ink is one of the standout features Apple introduced to iMessage back in 2016, part of a suite of message effects designed to make texting feel more expressive. While others like "Slam" and ...

A 110-year-old lemon which was used for writing secret messages with its juice, and formed evidence to convict and lead to the execution of Karl Muller for spying for Germany in World War One is ...

The 110-year-old lemon was a key exhibit in the trial of a German spy in WW1 A 110-year-old lemon which was used for writing secret messages with its juice, and formed evidence to convict and lead to ...

ALBUQUERQUE, N.M. (WHAT THE TECH?) — Like cyber criminals with AI, parents might be interested to know that people have been using invisible commands for years on apps we all use. When some of us were ...