A year of adapting — to lockdowns and job losses, isolation and separation, hardships and home offices, masking up and dressing down — has also seen a tectonic shift in how we simply say hello.

Facial expression scanning unreliable for threat detection: researcher By Postmedia News Published Oct 05, 2011 3 minute read ...

Behold the 'not face': This universal expression is used across cultures to communicate disapproval The 'not face,' researchers say, is a combination of the furrowed brow of 'anger,' the raised ...

What you do with your face makes a big difference. "In sign language, you modify the meaning through facial expression," says Fawn Alleyne, an ASL interpreter working on the project.