Quantum Entanglement
One of the biggest scientific mysteries today that remains unsolved is quantum entanglement. Entanglement occurs in separate parts that share a history, for example, a measurement of one of the parts reveals what you will find when you measure its distant relative. It’s established by experiment. It also suggests that space and time don’t constrain quantum phenomena the way it does with ordinary human activity.

Science News states, that “among the latest intriguing aspects of entanglement to be studied involves black holes. It seems that black holes can be entangled, which is equivalent to their being connected by a wormhole. Related work suggests that space, time, and gravity are all part of a vast quantum entanglement network.” Black holes remain a huge mystery to scientists. There’s even a chance that all of that is too hard for human brains to comprehend. It might take artificial intelligence for us to understand quantum entanglement, which is scary to think about. AI will become more intelligent than humans one day (Science News).