The Antikythera Mechanism is one of those magical unexplainable discoveries that convinces people that aliens are responsible for all the monuments of the past (spoiler alert: they aren’t).
Anyone can see that you’re undermining the awe-inspiring achievements of the human past by claiming that our ancestors were not intelligent enough to build their societies and needed to rely on extraterrestrial aid.
BUT I PERCEIVE THAT I DIGRESS.
The Antikythera Mechanism was found in a shipwreck off one of the islands of Greece in the early 20th century. It’s a frigging computer.
Did I mention that it dates from 100BCE?
The Mechanism calculates astronomical positions perfectly (hence the alien theories). Basically, you crank in a date, and it tells you the position of the sun, moon, and stars. It has so many features that it was probably not used for navigation, so no one’s really sure what the purpose of it was. What is sure is that it is incredible, super advanced, flipping complicated, and will probably always be deliciously mysterious.