Re: Once in a blue moon ...

[Tomica]

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Some scientists claim that the universe did not have a beginning. Some theologians contend that the universe did not need a beginning. Yet the universe is expanding, and so run the movie in reverse and there seems to be a beginning. What stakes are riding on whether the universe had a beginning?

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Some scientists take time travel seriously. Should you? What does time travel reveal about the nature of space and time and the laws of physics under extreme conditions? Featuring interviews with Michio Kaku, J. Gott, Kip Thorne, Fred Wolf, and Seth Lloyd.

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What does it mean for space and time to be the same thing? Not related to each other, but literally two descriptions of precisely the same entity called 'spacetime'? One cannot understand existence without understanding spacetime.




Nima Arkani-Hamed (born 5 April 1972) is a Canadian/American theoretical physicist with interests in high-energy physics, string theory and cosmology. Formerly a professor at Harvard, Arkani-Hamed is now on the faculty at the Institute for Advanced Study at Princeton.

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From the fusion of stars to the evolution of life, the world works because the laws of nature or physics make things happen. Our universe as a whole may have come into existence through the laws of quantum physics. But from where did the laws of quantum physics come? Have they always existed?



Bas C. van Fraassen is a Distinguished Professor of Philosophy at San Francisco State University and the McCosh Professor of Philosophy Emeritus at Princeton University.

[Tomica]

It's a big universe out there, full of an astonishing variety of questions and puzzles. Today's guest, Janna Levin, is a physicist who has delved into some of the trippiest aspects of cosmology and gravitation: the topology of the universe, extra dimensions of space, and the appearance of chaos in orbits around black holes. At the same time, she has been a pioneer in talking about science in interesting and innovative ways: a personal memoir, a novelized narrative of famous scientific lives, and a journalistic exploration of one of the most important experiments of our time. We talk about how one shapes an unusual scientific career, and how the practice of science relates to more traditionally humanistic concerns.



Janna Levin received a Ph.D. in physics from MIT, and is now the Tow Professor of physics and astronomy at Barnard College of Columbia University. She is the author of  How the Universe Got Its Spots, A Madman Dreams of Turing Machines, and Black Hole Blues. Her awards include the PEN/Bingham Prize and a Guggenheim Fellowship. She is also the director of sciences at Pioneer Works in Brooklyn, NY.

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Jako zanimljiv podcast s Jannom, Tysonom i Chuckom!




Neil deGrasse Tyson, co-host Harrison Greenbaum, and astrophysicist Janna Levin answer questions on the far away and the far out, including Andromeda's impending collision with the Milky Way, white holes, a holographic universe, and more. Prepare to get trippy!

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Carlo Rovelli jedan je od autora kvantne loop gravitacije, teorije koja je kandidat za objedinujucu teoriju kvantne mehanike i teorije relativnosti, odnosno kandidat za kvantnu teoriju gravitacije koja predstavlja sveti gral znanosti vec duuugi niz godina.

Unutar Rovellijeve teorije pojavljuju se i tzv  Planckove zvijezde.

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What can possibly replace the singularity? What are Planck stars and Gravastars? What’s it like to fall into a rotating black hole? I discuss these questions and more



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Quantum mechanics and general relativity are the two great triumphs of twentieth-century theoretical physics. Unfortunately, they don't play well together -- despite years of effort, we currently lack a completely successful quantum theory of gravity, although there are some promising ideas out there. Carlo Rovelli is a pioneer of one of those ideas, loop quantum gravity, as well as the bestselling author of such books as Seven Brief Lessons on Physics and the recent The Order of Time. We talk about how to make progress on this knotty problem, including whether string theory will play a role (Carlo thinks not).

Carlo Rovelli is a professor of theoretical physics at the Centre de Physique Théorique de Luminy of Aix-Marseille University in France. In 1988, he and Abhay Ashtekar and Lee Smolin introduced the idea of loop quantum gravity. He is also the author of the "relational" interpretation of quantum mechanics

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