Black holes could be portals to the past or future from "summary" of Time Travel in Einstein's Universe by J. Richard Gott
In the realm of space and time, black holes hold a mysterious allure. These cosmic entities possess such immense gravitational pull that not even light can escape their grasp. However, what lies beyond the event horizon of a black hole has been the subject of much speculation and debate. According to the theory of general relativity, black holes warp the fabric of spacetime to such an extent that they create a singularity at their center. This singularity is a point of infinite density where the laws of physics as we know them break down. It is here that the concept of black holes serving as portals to the past or future comes into play. One intriguing possibility is that black holes could act as shortcuts through spacetime, allowing for travel to different points in time. If one were to enter a black hole and navigate through its intricate web of spacetime, it might be possible to emerge at a different point in the past or future. This no...
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