Yeah, I know this thing in the hand of the Center for Fortean Zoology's Jon Downes looks like a mini-Flying Saucer (possibly, you might think, complete with diminutive extraterrestrial crew).
But, of course, it's nothing of the sort - although it would be wonderful if it was! (Click on the photo for a closer look.)
Nope, it's actually a particularly UFO-looking type of snail that can be found on the island of Puerto Rico - which is where the photo was taken when, in 2004, me and Jon were trekking around the island's El Yunque rain-forest in search of the Chupacabra.
Of course, that probably won't satisfy some paranoid souls, who will no doubt claim that the snail story is actually a cover to "hide the truth" of the tiny aliens of El Yunque. Ho-hum, such is Ufology...