Her messages may need to be found - they're usually hidden away or placed somewhere that isn't at eye level. A few years ago, Sarah affixed a mini-banner to the bottom of a fence around a ...

Graduate students from New York University created the smart hoodie Wearers can touch the hood and sleeves to send secret messages ... send pre-programmed messages Clothing can be used secretly ...

TikTok videos promoting the theory offered as evidence one tag sewn into some clothing that read "Do ... it's tied to a worker sending a secret message. The same claims have also spread on Twitter ...