CTCs are hypothetical paths in spacetime that loop back on themselves, allowing an object or person to return to their own past.
Currently, there is no known way to create CTCs in our universe. The concept of CTCs is based on theoretical models and is not yet achievable with current technology.
If CTCs were to exist and be created, it would violate the principle of causality, as events in the past could potentially affect events in the future. This raises questions about free will and the possibility of changing the past.
There is currently no scientific evidence to support the existence of CTCs, and they are not compatible with our current understanding of the laws of physics. However, some theories, such as quantum mechanics, allow for the possibility of CTCs under certain conditions.
As CTCs are still a theoretical concept, scientists primarily study and research them through mathematical models and simulations. However, some scientists also investigate the possibility of CTCs through thought experiments and theoretical physics.