Facebook AI has learned how to read your face and prompted a bot to respond appropriately

Facebook has taken a step closer to the border between between human and AI interactions.

According to New Scientist, the social network's AI lab directed a bot to watch hundreds of Skype conversations from Youtube to analyze subtle facial expressions-then try to respond to them.

The bot is said to be able to "tilt its head" or "open its mouth" while viewing video of a human laughing.

A volunteer panel judged the bot and deemed it "qualitatively realistic," presumably while their mouths hung open.