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How about space? I understand a standard assumption in cosmology is that the universe is spatially infinite in extent. Of course whether it actually is - is an entirely separate question. For how can you measure something to be infinite? It maybe that some parameter is inversely related to that something. And you could measure that value to be zero. In ...

This is a philosophical question so here is a philosophical answer. The scientific method in based on repeated observations and experiment. The whole science is just a collectivist instrument of acquiring knowledge. Being an instrument, it has its own limitations. Among them are: The tools employed by science are built by humans. As such, all tools use ...

No (understandable/explainable) physical quantity could be infinite. "Infinity" is is physically very vague. When we say something is "infinite", it almost means we're throwing our hands up in despair that we can't explain something, or that quantity doesn't make sense in some particular framework. The whole point of physical quantities (observables) is to ...

Here is a list of actual infinities in physics, mentioning Real Numbers. For instance, a set of all possible distances, this is a set with infinite cardinality, and thus actually infinite. Even the same distance, from infinitude of possible observers, is infinitely large or distance between relatively moving objects has infinity of values, taken at ...