This OT7 reunion has excited ARMYs, who have shut down the internet with the visuals! jungkook reveals new chest tattoo at j-hope concert; armys go wild, say 'don't let bts reunion distract you' ...

In addition to the chest tattoo, Billie has two other ink designs on her body. She publicly debuted a tattoo of a dragon on her hip during her May 2021 lingerie photoshoot with British Vogue.

Health Wearable chest e-tattoo created by UT Austin researchers could detect early heart disease The wearable device will give clinicians a better chance to catch red flags for heart disease early.

This project rose out of a multi-university partnership of researchers who were awarded a grant in 2021 from the National Science Foundation's ASCENT program to study chest e-tattoo technology.