Juan Maldacena

“{{cite web|title=Juan M. Maldacena|website=Institute for Advanced Study|url=https://www.ias.edu/sns/malda}} (with several important links)”

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“... spacetime as a concept leads to some {{w|Singularity (mathematics)|singularities}} … where the equations fail. This happens in the interiors of the black holes when spacetime somehow collapses ... And, also, most importantly it happened in the beginning of the Big Bang.”