Tessering is fictional, but scientists say something like it could be real. 

WORMHOLES are tunnels through “wrinkles” in space.

Here’s a diagram showing how a wormhole could connect earth to a far-away star, Sirius. The red grid is “bent” or “wrinkled” space.

In this video, a scientist explains how wormholes might work.

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This science says wormholes are THEORETICALLY possible. 

This means that according to what scientists understand about the universe, wormholes could be real, but no one has ever traveled through one in real life.