Mind Matters Natural and Artificial Intelligence News and Analysis

TagEthan Siegel

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Science and research of the universe, spiral galaxy and physical formulas, concept of knowledge and education

Why Did Stephen Hawking Give Up on a Theory of Everything?

Daniel Díaz and Ola Hössjer continue their discussion of the fine tuning of the universal constants of nature with Robert J. Marks

In a continuing conversation with Swedish mathematician Ola Hössjer and Colombian biostatistician Daniel Díaz on the fine-tuning of the universe — and Earth — for life, Walter Bradley Center director Robert J. Marks asks them about why a Theory of Everything eludes us and about the life-permitting interval — the narrow window for life that the constants of the universe permit. This is the second part of Episode 3, “The universe is so fine-tuned!” (September 16, 2021). Earlier portions, with transcripts and notes, are listed below. https://episodes.castos.com/mindmatters/Mind-Matters-Episode-152-Hossjer-Diaz.mp3 This portion begins at 12:36 min. A partial transcript, Show Notes, and Additional Resources follow. Robert J. Marks: In truth, there’s a lot of fundamental constants — the electric charge of an electron,…

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アンドロメダ銀河

Some Say That the Universe Is a Donut. Others Say It’s a Hole.

Actually, as astrophysicist Ethan Siegel points out, there’s only one universe — which makes theorizing about it a problem.

At Forbes, theoretical astrophysicist Ethan Siegel comments: The true problem with the Universe is that there’s only one to observe, or at least, only one that we’re capable of observing. We don’t have a large sample of Universes to compare between, and we don’t have a large set of data points available to us within our Universe. It’s like rolling five dice, together, once. Your odds of getting all sixes is small: about 1-in-7800. Yet if you rolled five dice at once and saw that it came up all sixes, you wouldn’t necessarily conclude that it was anything more than random chance. Sometimes, nature just doesn’t give you the most likely outcome. It’s possible that the leftover photons from the…

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Distant planet system in space with exoplanets 3D rendering elements of this image furnished by NASA

We Are Warned: Don’t Try To Colonize Super-Earths

Theoretical astrophysicist Ethan Siegel tells us why he thinks it would end in disaster

According to NASA, super-Earth planets are “a class of planets unlike any in our solar system – are more massive than Earth yet lighter than ice giants like Neptune and Uranus, and can be made of gas, rock or a combination of both. They are between twice the size of Earth and up to 10 times its mass.” Such plants are common in our galaxy and so far we have discovered 1,342 of them. Some are hot enough to vaporize metal; some are dim and frozen. An infographic from NASA of the TOI 270 system provides examples of super-Earths in relation to Earth: From NASA: “This infographic illustrates key features of the TOI 270 system, located about 73 light-years away…

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Two Astronauts on the Alien Planet Discover Plant Life. Space Travel, Discovery Of Habitable Worlds and Colonization Concept.

Is Intelligence Common or Rare in the Universe?

A recent analysis says that life is common but intelligence not so much. Let’s explore the reasoning

We really don't know anything about life elsewhere in the universe so even university-trained scientists often try to WISH it into existence.

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