Celebrity Traitors: Neuroscientist explains why Maya and James may fail murder challenge
Seeing someone yawn can be enough to trigger a yawn of your own – but does it work if it’s fake?

© BBC
Seeing someone yawn can be enough to trigger a yawn of your own – but does it work if it’s fake?

© BBC
Seeing someone yawn can be enough to trigger a yawn of your own – but does it work if it’s fake?

© BBC