An author called David Meade is convinced that in September 'death planet' Nibiru is going to kill us all.
David, who wrote Planet X: The 2017 Arrival , believes the apocalypse will take place between September 20-23, and that clues are hidden in the Bible, and written on the pyramids.
The conspirator posted a video to YouTube in which he says: "It is very strange indeed that both the Great Sign of Revelation 12 and the Great Pyramid of Giza both point us to one precise moment in time – September 20 to 23, 2017.
"Is this the end of the Church Age and the transition to the Day of the Lord? There couldn't be two greater witnesses."
David thinks September spells the end for humankind
David thinks that Planet X will become visible in the sky around the middle of September, and it's then that disaster will strike.
Other conspiracy theorists have claimed that an unseen planet beyond Neptune – namely Nibiru – is going to destroy Earth.
As well as noting apparent mystic markings on the pyramids in Egypt, David's prediction is largely based on the Bible passage Isaiah, Chapter 13 9-10, which says, "See, the Day of the Lord is coming – a cruel day, with wrath and fierce anger – to make the land desolate and destroy the sinners within it.
"The Stars of Heaven and their constellations will not show their light. The rising sun will be darkened and the Moon will not give its light."
It's not the first time people have been convinced that Nibiru is going to crash into our planet. In December 2015, people thought the same, and before that, in 2012, many suggested that the ancient Mayan people had foretold the apoclypse.
Of course, you shouldn't worry. It is probably more likely that a nuclear war between North Korea and the US will kill us all off.