A wormhole has two mouths, and the two mouths are connected. The mouth may be spherical and the throat may be straight, but it can also go around and take a longer way than the more traditional route.
Wormholes were first established in 19 16, although it was not like this at that time. When reviewing Einstein's general relativity equation, Austrian physicist Ludwig Flamm found another solution: he described a "white hole", a theoretical black hole with time reversal, and the entrances of two black holes could be connected by a space-time pipeline.
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Einstein's general theory of relativity predicted the existence of wormholes mathematically, but it has not been discovered so far. A wormhole with negative mass may be found, and its gravity will affect the path of light.
Some solutions of general relativity allow wormholes, and every hole is a black hole. However, a naturally occurring black hole, formed by the collapse of a dying star, does not produce a wormhole itself.
Moreover, wormholes have no horizon, but only an interface with the outside world, through which wormholes are connected in time and space. The interface between wormhole, black hole and white hole is a space-time pipeline and the connection between two closed space-time areas. Here, the curvature of space-time is not infinite, so humans can safely pass through wormholes without being destroyed by huge gravity.
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