Infinity without limits. What shape does the Universe have?

Scientists have a simple answer to this one of the most difficult questions to imagine. What is the Universe like?

[Photo: Pablo Carlos Budassi, CC BY-SA 4.0, via Wikimedia Commons]

Before we start talking about the shape of the Universe, maybe a few words about finiteness, infinity and boundaries. From the fact that something has no boundaries it does not follow that it is infinite. A…

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