Check out this Android (robot). It has 32 gears in the face that can create many real life expression. If you take a quick glance, you might pass it as a human.
According to the information,
The team uses software called HEFES to Hybrid Engine for Facial Expressions Synthesis, which has been built up over the last 30 years to mimic the emotional responses of people.
It tells the motors how to respond in order to recreate a look, and the software can mix the various emotions on a sliding scale, for instance a smile tinged with sadness, or a laugh mixed with unease.
If you watch the video, it is kind of eerie.. I just think that they should follow the Japanese Android makers who make their Androids more “Kawaii (cute)”.