For decades, time travel was seen as science fiction—a dream for writers, a fantasy for dreamers. But modern physics is changing that perception.

Einstein revolutionized our view of time, showing it's not a universal clock but something that bends and warps around massive objects like stars. Then came Gödel’s mind-bending solution to Einstein’s equations: a rotating universe that could, in theory, loop time back on itself. Later, rotating black holes and wormholes entered the scene—cosmic phenomena that might connect different places and times.

The main barriers? Energy and stability. Traversable wormholes would require "exotic matter" or negative energy, both difficult to produce in meaningful amounts. Even if built, quantum effects could destabilize them before use. And while Stephen Hawking once argued time travel must not exist (since we see no future tourists), even he later admitted it might be possible under the laws of physics—just not practical yet.

Some theories suggest that changing the past simply spawns a new timeline, leaving your original untouched.

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