To spot the celestial 'smiley face,' skywatchers in the U.S. will need a clear view of the eastern horizon in the hour ...

The viral "smiley face" nickname first emerged on social media, with the crescent moon positioned as the smiling mouth and ...

All smiling involves contraction of the zygomatic major muscles, which lifts the corners of the mouth. But a Duchenne smile is characterised by the additional contraction of the orbicularis oculi ...