TOKYO — Japanese scientists have used human cells to develop an equivalent to living skin that can be attached to robotic surfaces to flash a realistic — if creepy — smile.

The University of Tokyo researchers published their findings this week along with a video of the gooey-looking pink material being stretched into an unsettling grin.

Register to unlock this article

Register to read this story and more for free.

Signing up for an account helps us improve your browsing experience.

Continue

OR

See our subscription options.

Already have an account? Log in here