In 2004, the Mars Exploration Rover Opportunity had already detected curious blueberry-shaped microscopic formations in the Martian soil but a much stranger picture was taken by Opportunity at the end of 2012, depicting bigger spherules in larger numbers. Suggested to be made of hematite – a possible sign of the past presence of water scientists are still uncertain of what these things might be.

This is a well-known picture that many people nowadays assume to be a computer job. But not many known that this large unknown marine animal is in fact a classic photograph taken by Robert Serrec in 1965 and widely discussed among zoologists.

This photograph is one of several observations made by some of the first man-made satellites in 1960 reporting unidentified objects on polar orbit, something that neither the US nor Russian were capable of at the time. Since then the “Black Knight” was said to disappear and reappear at regular intervals like in these pictures taken in 1998 by NASA’s STS-88 mission.

22nd November 1963, John Fitzgerald Kennedy, the 35th President of the United States, is assassinated by a gunman in Dallas, Texas. During the analysis of the film footage, a mysterious woman was spotted. She was wearing a brown overcoat and scarf on her head – the source of her nickname. She can be seen in many shots holding a camera and carefully filming the scene. The FBI searched for this woman for a long tome but could never discover her identity.

In the DVD extras of Chaplin’s “The Circus”, people were given access to a short film and photos of the movie’s premiere I 1928 in which appears a person seemingly talking on a cellphone. Filmmaker George Clark recently claimed this was proof of time travelers, and the story captivated the internet. Some raised the prospect that this person was actually using an ear trumpet but this does not explain why he woman appears to be laughing and talking into the device.

In 2007, a group of teachers, students and scientists established a science camp in Norway to study the phenomenon known as the Hessdalen Light. On a clear night, Bjorn G. Hauge managed to take this picture using an exposure time of 30 seconds. The analysis of the spectrum reveals the object to be made of silicium, iron, titan and scandium. Despite being the most informative, this photo isn’t the only one that has been taken of the phenomenon. But the lights still have scientists scratching their heads over what exactly is happening in the Hessdalen Valley.

June 5 1989, one day after the Chinese government’s violent crackdown on the Tiananmen protests in Beijing. Pictures are taken of Chang’an Avenue where a column of tanks is blocked by a man protesting alone in front of the armored vehicles. Who was the Tank Man and what happened to him remains a mystery, but the photograph immediately become very anous and the mystery man become a powerful symbol of non-violent resistance throughout theworld.

In 1964 Jim Tepleton was on a day trip to Burgh Marsh with his daughter and wife. Alone in the marsh he decided to take some photos of his daughter. When the pictures were developed, he noticed one with a mysterious figure appearing in the background. He complained to the film manufacturer Kodak, but analysis conformed that nothing unusual was done to the film.

This photo s a group portrait of Goddard’s squadron which had served in World War I at the HMS Daedalus training facility. At the top of the photo an intriguing detail a face appearing behind one of the officers, recognized by ex-members of the squadron to be an air mechanic named Freddy Jackson, who was accidentally killed two days earlier by an airplane propeller.

There is nothing wrong with this image, “do not attempt to adjust the picture”. As 17-136-20680 is the reference number of a photo taken by Apollo 17 near the Geophone Rock, during the last flight to the MOON and listed as a “blank” in the Apollo 17 photographic index. This photo certainly suffers from extreme light exposure and noise issues, but it’s in fact not completely blank, as adjusting the contrast reveals pyramid-like structures. An ironic discovery considering the ancient ruins of Stonehenge depicted on the mission badge.