The eyes are often referred to as the windows to the soul. Eyes convey various emotions, from joy and love to fear and sadness. But sometimes, our eyes can betray us, especially when we are trying to ...

Tweaked by a muscle twitch? From an uncontrollable fluttering eyelid to a pulsing calf muscle, these small, rapid involuntary muscle contractions may happen at any time -- and can be annoying.

This animatronic head is sold as a kit so you can learn the fun of building a fully robotic nut that can “turn left and right,” has moving eyes, eyelids and a mouth that “changes expressions”—though ...