In recent days, the internet has been abuzz with talk of a giant asteroid heading towards Earth that will cause death and destruction when it hits.
Rumours said the world could end as we know it due to an imminent strike expected between 15 and 28 September.
Nasa have now gone on record to reassure mankind, saying that's just not true.
The likelihood of any known potentially hazardous asteroid striking the planet within the next 100 years stands at 0.01%, the space agency said in a statement.
Persistent rumours on "numerous recent blogs and web postings" that an errant asteroid is due to wipe out not just Puerto Rico, but the Atlantic and Gulf coasts of the United States and Mexico, as well as Central and South America, persuaded Nasa scientists that they needed to speak up.
"There is no scientific basis – not one shred of evidence – that an asteroid or any other celestial object will impact Earth on those dates," said Paul Chodas, manager of Nasa's near-Earth object office at the jet propulsion laboratory in Pasadena, California.
"If there were any object large enough to do that type of destruction in September, we would have seen something of it by now."
The Guardian reports it's not the first time Nasa has punctured the excitement of doom-mongers. In 2012, it dismissed claims that the comet Elenin was on its way to destroy mankind, calling it a "trail of piffling particles".
The space agency was also proved right in its assertion that the world would not end on 21 December 2012, as the Mayan calendar came to an end, heralding the apocalypse.