Що було до початку Всесвіту: космологія Пенроуза та її конкуренти. Науково-популярна лекція.

A popular-science lecture on Penrose cosmology and its competing models. All content on this channel is completely free and not monetized. If you would like to support the channel voluntarily: Patreon:   / mihas1984   PayPal: [email protected] In this lecture, I explain how different scientists try to answer the question of what existed before space and time formed. We will discuss the ideas of Roger Penrose and how the universe of the far future, through Hawking radiation, may eventually “forget” that it is large and cold, becoming small and hot again. I will talk about what happens when supermassive black holes collide, what gravitational waves are, and how they might survive events like the Big Bang. We will discuss where we might potentially look for traces of previous universes (if they existed), and why not all scientists agree with this picture. In addition, we will cover other models: the “Big Bounce” in loop quantum gravity, eternal inflation, the ekpyrotic scenario of colliding branes in superstring theory, and more. Total lecture duration: 1 hour.