What Came Before the Big Bang?
Briefly

Researchers are exploring model space-times to provide new perspectives on the Big Bang's origin and what might have existed before the inflationary period, using Einstein's general theory of relativity as a guide.
Mathematicians are attempting to probe beyond the limits of current experimental observations by delving into potential scenarios before the rapid inflation of the universe, as detailed in a recent paper by three researchers.
Read at WIRED
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