Mysterious silica formations photographed in a Martian crater could represent evidence of alien life.
Steve Berry encountered a mysterious set of single-file tracks on a steep mountain slope in Bhutan.
NASA's Curiosity rover has photographed a huge wall of sand on the edge of the Martian desert.
A peculiar picture, which shows what looks like a figure walking on the clouds, has gone viral online.
Dr. Richard O’Connor has taken photographs of two silvery objects using special motion-sensing cameras.
A strange green light was photographed over South Africa by numerous witnesses during the weekend.
A photograph taken in the 1990s appears to show a creepy figure in white at the end of a corridor.
A distant galaxy cluster is home to the most powerful explosion to have occurred since the Big Bang.
An image taken from the cab of a lorry shows what looks like a dark figure walking in to a tunnel.
Recent photographs from New Horizons have revealed Pluto's surface in more detail than ever before.
The latest in a long line of anomalous objects spotted in Mars photographs is a floating wooden spoon.
An eerie face has been photographed peering out the window of a Birmingham scrap metal business.
Astronomers have identified the smallest ever exoplanet to be directly photographed through a telescope.
A visitor to the ruins of a Scottish castle managed to capture the image of a mysterious figure.
A new image of a rocky outcrop on the surface of Mars shows what looks like a large crab-like creature.
An actress and her friends discovered an unexpected extra in a photograph taken during a night out.
Amateur ghost hunters have captured an image of what looks like a shadowy woman's face in Torquay Museum.
The latest photographs from New Horizons show a distinctive heart shape on the surface of Pluto.
A secretive set of photographs has emerged showing two unidentified objects near a US Navy submarine.
An unexplained pair of hands has appeared in photographs taken by two separate cameras in Borneo.