An audio clip which was posted on reddit earlier this week has been dividing opinion across the world ever since it was uploaded.
Remember the gold/blue dress controversy of 2015? Well this appears to be the audio equivalent for 2018.
All the clip asks is whether you hear 'Yanny or 'Laurel'.
A sound professor in the US says older adults can hear 'Laurel' due to the frequency of the sound.
What do you hear? Find out below:
What do you hear?! Yanny or Laurel— Cloe Feldman (@CloeCouture)
That feeling when you hear 'Laurel':