What is infinity?

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What is infinity? Does it even exist? How many infinities are there? The following Plus articles will introduce you to the mind-bending concept of infinity, both from a mathematical and a physical view point. If you are new to infinity, then start with our introductory article

To go a little further see the following articles exploring

If you want to dig deeper, then see these slightly more challenging articles exploring

To see all the content on Plus that is relevant to the concept of infinity see here.