Astronomical observations.
Tools came first, as early humans began using rudimentary tools around 2.6 million years ago. Megaliths, on the other hand, started to appear around 9,000 to 4,000 years ago, marking a later stage of human development and societal organization.
We took a tour of Stonehenge and saw the megaliths.
Megaliths are large stones that have used before to build a structure or a monument.
Megaliths were often carved from solid stones and carried some distance. Sites like Stonehenge are made from these megaliths several thousand years ago.
out of rock
Probably celery.
Henges
The group of vertebrates most closely related to birds are probably the dinosaurs.
Malta
Megaliths such as the Stonehenge.
A stone called megaliths.
Stonehenge