This article was originally published at The Conversation.The publication contributed the article to Live Science's Expert Voices: Op-Ed & Insights.
Let's face it – without a face no-one would recognise us, nor would we be able to guess what others might be thinking or feeling.
Faces and their subtle degrees of symmetry and expression have defined human beauty and tragedy throughout past millennia of art and drama.
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You only need to enter your comment once! Comments will appear once they have been moderated. This is so as to stop the would-be comedian who has been spamming the comments here with inane and often offensive remarks. You know who you are!