Important Notice: Our web hosting provider recently started charging us for additional visits, which was unexpected. In response, we're seeking donations. Depending on the situation, we may explore different monetization options for our Community and Expert Contributors. It's crucial to provide more returns for their expertise and offer more Expert Validated Answers or AI Validated Answers. Learn more about our hosting issue here.
Einstein’s General Theory of Relativity allows the possibility that a practical time machine might be built. Such a machine would need to be able to create and manipulate black holes, and the technology needed for it is far more advanced than anything humanity might devise for hundreds or even thousands of years.
