Uncanny Valley! Watch as a creepy humanoid robot mimics a researcher's facial expressions in real time - with eerie precision

If we want to live in a world where we interact with robots, they'll have to be able to read and respond to our facial expressions in lightning-fast time.

Now, scientists have come a step closer to creating such an advanced machine.

'Emo', built by experts at Columbia University in New York, is the fastest humanoid in the world when it comes to mimicking a person's expressions.