1560
Two previously-unknown cavities have been identified within the walls of Egypt's Great Pyramid of Giza.
9
A secret US facility hidden beneath the ice is believed to contain significant amounts of nuclear waste.
16
Researchers have revealed their latest findings on the enigmatic 2,000-year-old Antikythera Mechanism.
6
A new type of scanning technology is being employed to look for hidden chambers inside the Great Pyramid.
308
The huge sphere, which measures around 5ft across, is thought to be evidence of an ancient civilization.
6
A British historian has found hidden annotations within the pages of a Bible published back in 1535.
34
John Podesta maintains that he has convinced Hillary Clinton to declassify secret documents about UFOs.
289
New scans will take place next month in a renewed bid to locate a secret room in King Tutankhamun's tomb.
2
An 11,000-year-old pendant unearthed in Yorkshire has been inscribed with a series of lines and symbols.
70
A new maths study has suggested that it is very difficult to keep a conspiracy under wraps for long.
17
The secret behind the carnivorous plant's success is its ability to count how many times it is touched.
18
The United States once planned to build an orbiting outpost to help gather intelligence about the USSR.
57
Archaeologists have discovered compelling evidence of an empty space hidden behind one of the walls.
104
An international team is planning to use modern scanning technologies to seek out hidden chambers.
11
Subterranean passageways once believed to be an urban legend have actually turned out to be real.
93
Officials have hinted at a 'significant find' in the hunt for the lost Nazi gold train in Poland
10
Efforts to uncover the secrets of the tomb linked to Alexander the Great in Greece have come to a halt.
14
Researchers have identified a subtle optical illusion responsible for the painting's enigmatic smile.
57
An English archaeologist believes that Queen Nefertiti may lie in a secret room in Tutankhamun's tomb.
43
The German government has lost the right to keep its research on the UFO phenomenon from the public.