We're trying to find the shape of space': scientists wonder if the universe is like a doughnut
Briefly

We're trying to find the shape of space... the question of the shape of the universe remains wide open and surveyed the future prospects for pinning it down.
The topology of an object specifies how its parts are connected... Similarly, a sphere, cube, and banana all have the same topology, with no holes.
Read at www.theguardian.com
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