The Antikythera Mechanism

In 1901, the Antikythera mechanism was discovered among the remains of a shipwreck off the coast of the Greek island of Antikythera. The hand-powered device is regarded as the first known analog computer and was used to predict eclipses and astronomical positions years in advance. It could also track the cycle of the ancient Olympics.
I'm wondering, if s/o writes:
"Faaaake - how can it be?
The US exist since 1776-07-04 ! Nothing can be before!
Don't be a woke leftist, do your own research, touch some grass and never trust science or the universities!"
Bomb! What the fuck?