How do we know that the universe isn't smaller then we thought

Futurdreamz said:

In some games if you walk off the edge of the screen on the right you reappear on the left side of the screen, as instead of being a space with defined barriers it loops back onto itself so you can travel in any direction infinitely.

What if the universe is like that? Where if you travel far enough in a particular direction you end up right where you started? So when we are viewing deep space we are actually viewing light that has looped through the universe multiple times, each time showing a younger and younger universe until the oldest light that has done the most loops is showing the big bang that started it all? how would we verify if that is true or not?

Click to expand...

A Masterpiece of Classic Science Fiction:​

Flatland: A Romance of Many Dimensions is a satirical novella by the English schoolmaster Edwin Abbott Abbott, first published in 1884. Written pseudonymously by "A Square",the book used the fictional two-dimensional world of Flatland to comment on the hierarchy of Victorian culture, but the novella's more enduring contribution is its examination of dimensions.

Physicists and science popularizers Carl Sagan and Stephen Hawking have both commented on and postulated about the effects of Flatland. Sagan recreates the thought experiment as a set-up to discussing the possibilities of higher dimensions of the physical universe in both the book and television series Cosmos, whereas Hawking notes the peculiarity of life in two-dimensional space.

Click to expand...