A historian taking pictures of a barn was startled to discover a mysterious extra in one of the shots.
An image taken from orbit that was featured on NASA's website shows a potentially otherworldly extra.
In a bizarre incident, a man attempting to photograph a beaver ended up being killed by the creature.
A student photographed the unidentified creature from her bedroom window as it bounded through a park.
A photograph of a mysterious carnivorous creature has been posted by Jonah King on Twitter.
A strange photograph of an unidentified creature has been gaining popularity since appearing on Facebook.
A clear photograph of a strange object hovering in the skies over Seattle has been circulating on-line.
A UFO group in Taiwan is attempting to authenticate an image taken at a hiking site by a policeman.
Professor Enzo Di Fabrizio has taken photographs of DNA directly using an electron microscope.
The Hubble Space Telescope has photographed a galaxy that is 13.3 billion light years away.
NASA's Curiosity rover has used its robotic arm to take a detailed photograph of itself on Mars.
The Opportunity rover has snapped a picture of strange spherules that has experts scratching their heads.
Photographs of strange glowing blue objects on a Japanese shoreline have been circulating the Internet.
A photograph posted by a hiker on Flickr has lead to a whole new species of insect being identified.
Photographs of a mysterious carcass likened to the 'Montauk Monster' have been circulating the internet.
A spiral galaxy dating back to just 3 billion years after the Big Bang has been photographed by Hubble.
NASA's Mars Reconnaissance Orbiter has snapped a photograph of a strange hole on the Red Planet.
A picture showing two men holding up a huge owl has been circulating forums and social media sites.
Move over Face on Mars - Disney's beloved mascot has been photographed by the Messenger probe.
An 11-year-old boy managed to snap a photograph of a strange object while playing in his garden.