What if your body could tell the truth—even when your face couldn’t? A new wearable device may be the future of emotional transparency.

To help health care providers tell the difference, a team has created a stretchable, rechargeable sticker that can detect real emotions -- by measuring things like skin temperature and heart rate ...

We’ve all faked a smile at some point—to respond politely to a bad joke in a Zoom meeting, to show appreciation for a gift that misses the mark, or to cover up personal discomfort and sadness.