Questions regarding a theoretical 'tunnel' through spacetime which could potentially allow time travel.

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Is a Wormhole a tunnel? [closed]

In films such as Interstellar, 2001: A Space Odyssey, and Contact (and also Star Trek Deep Space Nine) wormholes are depicted as tunnels along the edges of which fantastical colours and shapes lie. ...
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What is a wormhole?

I have learned that there are white holes and black holes in the universe, but I am confused as to what a wormhole is. Is it a tunnel that connects black and white holes?