Hollow rock in Sicily might be an ancient calendar rock
A rock with a round hole about 1 metre in diameter might have served as a calendar marking the beginning of winter to people living in Sicily 5000 years ago.
Archaeologists reveal a supposed ancient astronomical observatory in Australia
Archaeologists believe to have found an ancient observatory at Wurdi Youang, west of Melbourne, Australia, that was used by indigenous Australians to track the movement of the Sun and Moon even 14000 years ago.