Researchers used volunteers dressed up in monster costumes to investigate how people reported sightings.
A bag filled with items brought back from the Apollo 11 mission has been found in Neil Armstrong's house.
Four unidentified figures have been captured in a controversial video recorded through a webcam.
A man from Fife has broken a ten-year silence by revealing his encounter with a mysterious hominid.
A video showing a figure walking through the snow was recorded on Tuesday in Brooklyn, New York.
A mysterious figure was caught on camera by a canoist in marshlands outside of Tampa, Florida.
Footage has emerged of a strange object which allegedly hovered in the sky for around three minutes.
Footage has emerged showing a large hominid strolling through the snows of a Russian forest.
CCTV footage has emerged of an alleged 'ghost' wandering the hallways of Pocatello High School.
An aircraft passenger managed to capture footage of an unidentified object above the city.
A controversial picture taken by a retired electrician has been making headlines since appearing online.
Bill Brock has been investigating two recordings which show a mysterious figure out in the woods.
Alexander Gerst has created a breathtaking visual record of our planet as seen from space.
A future manned mission to Venus could see astronauts piloting blimps around the planet's atmosphere.
The impressive five-foot-long aquatic surveillance robot looks and moves like the real thing.
Amateur naturalist Henry James McCooey witnessed the creature near Australia's Batemans Bay in 1882.
Bizarre footage of what looks like someone in an ape costume ambling along a street has appeared online.
A motel operator in New York State is seeking to have Bigfoot added to a local endangered species list.
Breathtaking aerial footage of the London skyline was recorded by an eagle as it soared overhead.
Two sets of human footprints dating back to the Stone Age have been found on the island of Lolland.