Just like it did two years ago, a freaky galactic phenomenon meant Mars appeared in the sky as large as the full Moon on Tuesday.
Only it didn't. And it didn't happen two years ago either. In fact it's completely impossible - except on Facebook, where the rumours quickly spread earlier this week ahead of the supposed astronomical disaster.
Even when Mars was at its closest to the Earth in 2003 - when the hoax began - it was still only 1/72 the size of the full Moon.
This didn't stop the incessant 'Mars Hoax' once again convincing suggestive minds that it could be true.
Social media and email was awash with pictures claiming to show a massive Mars alongside an equally - but infinitely more plausibly - massive Moon.
The text of the hoax read:
WARNING: August 27 at 00:30 Lift up your eyes and look up at the night sky. On this night, the planet Mars will pass just 34.65 million miles from the earth. To the naked eye it looks like two of the moon above the ground! ... Share the news with your friends, because no one living on this earth has ever seen!
And no one ever will.