How to Build a Time Machine

Building a time machine, as commonly depicted in science fiction, isn't feasible with our current understanding of physics. However, theoretically, one might consider concepts from Einstein's general relativity, which suggests that massive objects can curve spacetime. A hypothetical time machine could involve a rotating black hole or a ‘wormhole’ to connect different points in time. These ideas require exotic matter and energy that we don’t yet possess. Ultimately, while intriguing, time travel remains speculative and is not practically achievable with today's technology and scientific knowledge.