How Does Gravity Escape A Black Hole?

January 27th, 2022

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Fact: in a black hole, all of the mass is concentrated at the singularity at the very center. Fact: every black hole singularity is surrounded by an event horizon. Nothing can escape from within the event horizon unless it can travel faster than light. Fact: gravity travels at the speed of light. So how does a black hole manage to communicate its gravitational force to the outside universe? How does gravity escape a black hole?

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Posted in Physics |

How To Build The Universe in a Computer

January 19th, 2022

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We routinely simulate the universe on all of its scales, from planets to large fractions of the cosmos. Today we’re going to see how it’s possible to build a universe in a computer – and see whether there’s a limit to what we can simulate.

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Posted in Physics |

How To Simulate The Universe With DFT

January 12th, 2022

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If you used every particle in the observable universe to do a full quantum simulation, how big would that simulation be? At best a large molecule. That’s how insanely information dense the quantum wavefunction really is. And yet we routinely simulate systems with thousands, even millions of particles. How? By cheating. Using the ultimate compression algorithm: Density Functional Theory (DFT). Let’s learn how to cheat the universe.

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Posted in Physics |

How to Find ALIEN Dyson Spheres

December 29th, 2021

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On our search for alien lifeforms we scan for primitive biosignatures, and wait and hope for their errant signals to happen by the Earth. But that may not be the best way. Any energy-hungry civilization more advanced than our own may leave an indisputable technological mark on the galaxy. And yes, we’re very actively searching for those also. Time to update you on the hunt for galactic empires.

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Posted in Physics |

What Happens If A Black Hole Hits Earth?

December 20th, 2021

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The possibility that a black hole could actually impact Earth may seem straight out of science fiction, but the reality is that microscopic primordial black holes could actually hit Earth. If one did, it wouldn’t just impact like an asteroid, it’d pass straight through the entire Earth and exit the other side. Perhaps craziest of all, this may have already happened!

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Posted in Physics |

2021 End of Year AMA!

December 10th, 2021

Posted in Physics |

Are Black Holes Actually Fuzzballs?

November 17th, 2021

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Black holes are a paradox. They are paradoxical because they simultaneously must exist but can’t, and so they break physics as we know it. Many physicists will tell you that the best way to fix broken physics is with string. String theory, in fact. And in the black holes of string theory – fuzzballs – are perhaps even weirder than the regular type.

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Posted in Physics |

What If Our Understanding of Gravity Is Wrong?

November 10th, 2021

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What if there is no such thing as dark matter? What if our understanding of gravity is just wrong? New work is taking another shot at that Einstein guy. Let’s see if we’ve finally scored a hit with Modified Newtonian Dynamics aka MOND.

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Posted in Physics |

Is ACTION The Most Fundamental Property in Physics?

November 2nd, 2021

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It’s about time we discussed an obscure concept in physics that may be more fundamental than energy and entropy and perhaps time itself. That’s right – the time has come for Action.

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Posted in Physics |

Will Constructor Theory REWRITE Physics?

October 20th, 2021

Check Out American Voices: Keep it Close: https://youtu.be/LMJqb5A51_Y

The people behind the greatest leaps in physics – Einstein, Newton, Heisenberg, all had the uncanny ability to see the fundamentals – see the deepest, underlying facts about the world, and from simple statements about reality they built up their incredible theories. Well what if we all had a recipe book for doing exactly this. Well, one might be just around the corner and it’s called Constructor Theory.

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Posted in Physics |

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