Recent observations by the James Webb Space Telescope (JWST) have added new weight to one of the most perplexing problems in cosmology: the Hubble Tension. This issue, which describes the discrepancy ...

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One of the most stubborn issues in cosmology today concerns the universe's rate of expansion. Scientists know it's expanding, but defining the rate of that expansion is challenging. The rate of ...

This article was published in Scientific American’s former blog network and reflects the views of the author, not necessarily those of Scientific American What do we really know about our universe?