For years, archaeologists have remained divided over the discovery of alleged giant skeletons and artifacts.
The disappearance of Kenny Veach still remains a topic of debate and intrigue almost 10 years on.
The bill requires that information about UFOs be disclosed, but now gives the Pentagon free reign to withhold whatever it wants.
Visitors to Pirunkirkko in Heinola, Finland have often felt the presence of some sort of spirit within the cave.
The swords were found in a high up, inaccessible crevice where they had been hidden two millennia ago.
The remarkable stunt was part of an experiment to help scientists better understand the effects of extreme isolation.
Hunter-gatherers who painted on cave walls 20,000 years ago also left behind something quite unexpected.
New research has suggested that the process of creating cave paintings may have been a family affair.
Police in Italy have discovered the remains of a man who is thought to have died over 50 years ago.
A caving team has become the first ever to descend into the depths of Yemen's terrifying sinkhole.
Caves dotted around the surface of the Red Planet could provide a safe haven for future human explorers.
A young girl buried in a European cave centuries ago was discovered with the head of a finch in her mouth.
Archaeologists have unearthed a child who was buried at Panga ya Saidi cave almost 80,000 years ago.
A gargantuan cave in the Canadian wilderness was only recently discovered because it had been filled with ice.
British railway workers have discovered a previously hidden cave that was exposed following a landslip.
NASA has released a fascinating photograph showing a large cave entrance on the slopes of a Martian volcano.
The well-preserved fossil remains of a 330 million-year-old shark have been discovered in a cave in Kentucky.
A cave painting dating back 44,000 years shows the earliest known depiction of a supernatural creature.
Forensic experts have created a detailed reconstruction of a Neolithic woman found in a cave in Gibraltar.
Modern forensic techniques have been applied to an ancient fractured skull found in a cave in Romania.