According to Fortean Times magazine, reports of UFO sightings, claims of nausea, sudden patches of grey mist, and sensations of being pushed or followed have been made since the 1960s, as well as a number of reports of pets being sick or lost in the area.
Some scientists and cryptozoologists agree that the 1934 Tatzelwurm photograph was a hoax, but Tatzelwurm sightings have continued to the present day, and German cryptozoological researcher Ulrich Magin has published several articles in Fortean Times and his own magazine Bilk documenting them.
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Bertram has written for a range of publications including The Australian, The Australian Financial Review, People Magazine, 3D World and Fortean Times.
Until 2002, Sieveking was co-editor of the magazine The Fortean Times with its founder Bob Rickard.
TV Personality Benjamin Radford, who investigated the Popobawa in 2007, reported in the Fortean Times that the legend has its roots in Islam, the dominant religion in the area.
It is often contrasted with the better known extraterrestrial hypothesis (ETH), and is particularly popular among UFO researchers in the United Kingdom, such as David Clarke, Hilary Evans, the editors of Magonia magazine, and many of the contributors to Fortean Times magazine.
Sieveking was introduced to FT-founder Bob Rickard by mutual friend Ion Will in 1978, some five years and more than 25 issues after it was first self-published as The News in 1973, before becoming Fortean Times in 1976.