shimpsblog [en]

Curvature is an intuitive concept in mathematics and very important for the understanding of gravity in the context of Einstein's general theory of relativity.

What is "mean" about the mean curvature?

2maniac

Aug 2, 2024

• https://www.youtube.com/watch?v=b8b5qyLovew
  • 5m13s

The 2014 Isaac Asimov Memorial Debate was about selling space.

2014 Isaac Asimov Memorial Debate: Selling Space

American Museum of Natural History

Mar 21, 2014

• https://www.youtube.com/watch?v=GbmFeEIKBFI
  • 1h55m24s

A longer version of Lawrence Krauss' talk, but the cut is a bit confusing.

Professor Lawrence Krauss: The secret life of physicists

Ripa Redo

Sep 18, 2017

• https://www.youtube.com/watch?v=ZkdakjHL0Qg
  • 1h51m34s

Lawrence Krauss in another version of his talk about the way of scientific thinking.

Lawrence Krauss - The Secret Life of Physicists

NECSS

Apr 24, 2014

• https://www.youtube.com/watch?v=h9FurAf4C4g
  • 1h06m34s

Lawrence Krauss explains how to think in a scientific way by reducing problems to simple questions. This method (not only) from physics helps to estimate the number of piano tuners in London.

Professor Lawrence Krauss: The secret life of physicists

alain boulay

Dec 11, 2017

• https://www.youtube.com/watch?v=kOR_W473wEc
  • 1h22m19s

This is part V of a mixed mini series about generating functions.

Olympiad level counting (Generating functions)

3Blue1Brown

May 23, 2022

• https://www.youtube.com/watch?v=bOXCLR3Wric
  • 34m35s

This is part IV of a mixed mini series about generating functions.

How you can solve dice puzzles with polynomials

Zach Star

Aug 17, 2021

• https://www.youtube.com/watch?v=XjQoNbJI7Sw
  • 10m01s

WP: Sicherman dice

This is part III of a mixed mini series about generating functions.

Explaining the bizarre pattern in making change for a googol dollars (infinite generating functions)

Mathologer

Jan 23, 2021

• https://www.youtube.com/watch?v=VLbePGBOVeg
  • 30m39s

According to modern physics, nothing is something with properties. This is kind of mind-boggling. Among others Lawrence Krauss is an expert of nothing.

2013 Isaac Asimov Memorial Debate: The Existence of Nothing

American Museum of Natural History

Mar 22, 2013

• https://www.youtube.com/watch?v=1OLz6uUuMp8
  • 1h53m59s

This is part II of a mixed mini series about generating functions.

Counting with Calculus: The Magic of Generating Functions

SackVideo

Aug 20 2020

• https://www.youtube.com/watch?v=dLiT9axMDrg
  • 21m51s

This is part I of a mixed mini series about generating functions.

Generating Functions and Counting With Them - An Intro

patrickJMT

Dec 27, 2016

• https://www.youtube.com/watch?v=n9FFBXBccow
  • 14m58s

WP: Generating function

Tardigrades are strange micro-animals. Extremly low temperatures, boiling water up to 150°C, high pressure or cosmic radiation are not survival challenges.

We FINALLY Understand Why Tardigrades Refuse to Die

Dr Ben Miles

Sep 26, 2024

• https://www.youtube.com/watch?v=zV2wIfDzFMk
  • 19m39s

Tardigrade
Microfauna

There is a hypothetical object even stranger than a black hole: a white hole.

White Holes | Space Time

PBS Space Time

Aug 30, 2017

• https://www.youtube.com/watch?v=S4aqGI1mSqo
  • 13m26s

WP: White hole

According to Kruskal–Szekeres coordinates, space and time switch their roles inside a black hole. A Penrose diagram helps to understand the situation.

How Time Becomes Space Inside a Black Hole | Space Time

PBS Space Time

Mar 30, 2017

• https://www.youtube.com/watch?v=KePNhUJ2reI
  • 15m28s

WP: Kruskal–Szekeres coordinates
WP: Penrose diagram

The geometry of Einstein's theory of relativity is deeply connected with the causal structure of the universe.

The Geometry of Causality

PBS Space Time

Feb 2, 2017

• https://www.youtube.com/watch?v=1YFrISfN7jo
  • 16m06s

What is a phantom singularity meaned to be? The Schwarzschild metric has got one at the event horizon. This singularity is due to the choice of coordinates which are not suited to describe what is going on at this position.

The Phantom Singularity | Space Time

PBS Space Time

Jan 19, 2017

• https://www.youtube.com/watch?v=-q7EvLhOK08
  • 18m04s

On the way into a black hole you must pass the event horizon. What is happening there?

What Happens at the Event Horizon? | Space Time | PBS Digital Studios

PBS Space Time

Dec 9, 2016

• https://www.youtube.com/watch?v=mht-1c4wc0Q
  • 19m58s

Neither in classical nor in quantum mechanics information can be destoyed. But black holes seem to be an exception from this fundamental law of nature.

The Black Hole Information Paradox

PBS Space Time

Jun 20, 2018

• https://www.youtube.com/watch?v=9XkHBmE-N34
  • 15m29s

A new paper tries to unite quantum physics and Einsteins's general relativity based upon Planck scale formalism. Unfortunately Sabine Hossenfelder doesn't know what Planck scale formalism is supposed to be, neither do I. However, the new paper is kind of entertaining. It claims to explain so many things all in one. Quote [4m48s]: a lot of crap papers get published. Relax and enjoy:

A New Theory of Everything Just Dropped!

Sabine Hossenfelder

Sep 9, 2024

• https://www.youtube.com/watch?v=Yk_NjIPaZk4
  • 7m05s

Again the ultimate mystery: what happens inside a black hole?

What Survives Inside A Black Hole?

PBS Space Time

Jun 13, 2018

• https://www.youtube.com/watch?v=GscfuQWZFAo
  • 14m07s

There are a few things, which make people rethink the big bang theory. It is still the best explanation of the universe at the time. What exactly is going on?

What’s Wrong With the Big Bang Theory? | Space Time | PBS Digital Studios

PBS Space Time

Mar 2, 2016

• https://www.youtube.com/watch?v=JDmKLXVFJzk
  • 12m57s

Can we build - in principle - a black hole? How? Here is an explanation what's going on in this exotic and strange field of science.

How to Build a Black Hole

PBS Space Time

Dec 9, 2015

• https://www.youtube.com/watch?v=xx4562gesw0
  • 13m21s

The ultimate mystery: what happens inside a black hole?

Do Events Inside Black Holes Happen?

PBS Space Time

Aug 20, 2015

• https://www.youtube.com/watch?v=vNaEBbFbvcY
  • 14m24s

The inside of a black hole is a interesting place for modern physics. The concept of Penrose diagram reveals some insight.

What Happens INSIDE a Black Hole?

Astrum

Mar 28, 2024

• https://www.youtube.com/watch?v=qWW0HrVC30s
  • 18m00s

WP: Penrose diagram

This is part VI in a mini series of videos about Machian gravity.

What's Wrong with Classical Mechanics?

Unzicker's Real Physics

Sep 9, 2024

• https://www.youtube.com/watch?v=wNie5YA9uFI
  • 7m25s