The Known Unknowns: The Unsolved Mysteries of the Cosmos by Lawrence M. Krauss Groundswell Speaker 2024 invisible ocean walls and underwater

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The Known Unknowns: The Unsolved Mysteries of the Cosmos by Lawrence M. Krauss Groundswell Speaker 2024 invisible ocean walls and underwaterOur understanding of ourselves and the cosmos has advanced immeasurably over the last five hundred years of modern science, yet many fundamental mysteries of existence persist. How did our Universe begin, if it even had a beginning? How big is it? What's at the bottom of a black hole? How did life on Earth arise? Are we alone? Is time travel possible? These mysteries define the threshold of the unknown. To explore that threshold is to gain a deeper