An alleged skull found on the surface of Mars by UFO hunter Scott C Waring.
The conspiracist produced several reports claiming to have found creatures which resembled animal species on Earth, including a giant mouse, baboons, a bear, and crabs.
He also claimed to have found fossils and skeletal remains of an ancient humanoid civilisation he claimed once inhabited the Red Planet.
But Mr Waring, who had posted each day this month, suddenly stopped on Friday, releasing his final post.
He wrote: “My last post. Thanks for the seven years of support. We have accomplished a lot together.”
He said: “The cams are still up, years later.
“We posted some amazing sightings and discoveries along those seven years and we have made it to major news sites like CNN, NBC, ABC, CBS, Fox News and even New Scientist which said I was making a new area of science.”
But after saying ridicule against UFO hunters was less frequent now, he appeared to blame it for his own decision to quit.
This is serious stuff that has depths that even I can’t fathom. It deservers serious thought and research, not contempt and ridicule.
Nigel Watson, author of the UFO Investigations Manual, told Express.co.uk: “I think he was genuinely trying to find and share UFO sightings and anomalies captured by the cameras of the International Space Station and other space vehicles, but the sheer quantity of his ‘discoveries’ undermined their quality.
“This has led to criticism and inevitably ridicule, and the sad fact is that the subject relies on sensation and entertainment rather than searching for genuine evidence or data.
“I think Scott, like many others who become involved with the UFO subject, got obsessed with seeing evidence of UFOs and aliens everywhere.
“How many people really believe his photographic evidence that everything from massive skyscrapers to squirrels exist on the surface of Mars.
He said: “Perhaps he has made a serious mistake and must disappear for a while?
“Or perhaps it’s just a break or to test the reactions of his followers.
“But if this statement is true, the UFO Community will be better without him.”
Louise Lench from UFO Newshub had this to say
I find it bizarre that a man who has spent so many years searching for and revealing the truth would suddenly just stop. This is nonsensical and goes against the very core of what Scott believed in. I believe this was not a choice that was made by him. Someone, somewhere has instigated this.
Louise Lench, UFO Newshub