shimpsblog [en]

We already have got the Hubble tension, now we get the sigma-8 tension.

The Crisis in Cosmology Just Got So Much Worse

Sabine Hossenfelder

Dec 1, 2024

• https://www.youtube.com/watch?v=kKhDyj8XXLA
  • 7m01s

At the beginnig of modern auantum mechanics ~100 years ago Erwin Schrödinger introduced a then and now very successful equation. But this equation is based upon Newtonian mechanics. Later a relativistic equation was provided by Dirac. The simpler relativistic Klein–Gordon equation doesn't describe the hydrogen atom correctly. It was a challenging task at the time,

Deriving the Dirac Equation

Richard Behiel

Nov 20, 2023

• https://www.youtube.com/watch?v=CbYFanAGsSM
  • 16m33s

WP: Dirac equation
Klein–Gordon equation

The 2016 Isaac Asimov Memorial Debate was about the universe as possible simulation.

2016 Isaac Asimov Memorial Debate: Is the Universe a Simulation?

American Museum of Natural History

Apr 8, 2016

• https://www.youtube.com/watch?v=wgSZA3NPpBs
  • 2h00m58s

Who was Paul Adrien Maurice Dirac?

The Scientist Who Discovered the World's Most Beautiful Equation

Newsthink

Mar 25, 2024

• https://www.youtube.com/watch?v=AxTCMyDfX8Y
  • 14m57s

WP: Paul Dirac

What is entropy in thermodynamics? How does it fit into the picture of time-reversable laws of physics and differential equations?

I don't believe the 2nd law of thermodynamics. (The most uplifting video I'll ever make.)

Sabine Hossenfelder

Jun 17, 2023

• https://www.youtube.com/watch?v=89Mq6gmPo0s
  • 17m32s

Actually it looks like a change in scientific consensus regarding the most likely explanation of what dark matter is. Old and busted: WIMPs. New hotness: Axions.

Physicists Changed Their Mind about Dark Matter Particles

Sabine Hossenfelder

Nov 23, 2024

• https://www.youtube.com/watch?v=NqQbp-vh02Q
  • 7m54s

WP: Weakly interacting massive particle (WIMP)
WP: Axion

Is dark matter falsified by JWST observations regarding galaxy formation? Is this MOND revival?

Webb Falsified Dark Matter Prediction – And No One Cares

Sabine Hossenfelder

Nov 21, 2024

• https://www.youtube.com/watch?v=AagyRrIm2W0
  • 6m35s

Background

What might the new Webb telescope discover?

Sabine Hossenfelder

Jan 30, 2022

• https://www.youtube.com/watch?v=h6DhWQzYuuk
  • 11m58s

WP: James Webb Space Telescope
WP: Modified Newtonian dynamics

Sabine Hossenfelder does not trust science and does not trust scientists. This sounds weird? She explains what this is about.

How I lost trust in scientists

Sabine Hossenfelder

Aug 9, 2024

• https://www.youtube.com/watch?v=gMOjD_Lt8qY
  • 10m24s

Sabine Hossenfelder explains the trouble with science.

Science is in trouble and it worries me.

Sabine Hossenfelder

Nov 16, 2024

• https://www.youtube.com/watch?v=QtxjatbVb7M
  • 24m31s

The 2015 Isaac Asimov Memorial Debate was about water.

2015 Isaac Asimov Memorial Debate: Water, Water

American Museum of Natural History

May 1, 2015

• https://www.youtube.com/watch?v=FSF79uS3t04
  • 1h46m06s

Sabine Hossenfelder explains why physics is in a crisis.

The crisis in physics is real: Science is failing

Sabine Hossenfelder

Nov 4, 2024

• https://www.youtube.com/watch?v=HQVF0Yu7X24
  • 12m44s

Sabine Hossenfelder explains the situation of scientific research.

Is Science Dying?

Sabine Hossenfelder

Nov 18, 2023

• https://www.youtube.com/watch?v=KW4yBSV4U38
  • 15m37s

Professor Janna Levin gives an overview about our knowledge of physics and the universe.

From the Big Bang to Black Holes: Time, the Universe, and Everything

The Aspen Institute

Jun 29, 2014

• https://www.youtube.com/watch?v=N-Vbho3331c
  • 57m03s

Janna Levin

Professor Lisa Randall about our knowledge of physics and our universe:

Expanding Our Horizons: Matter, Space, and the Universe

The Aspen Institute

Jul 10, 2013

• https://www.youtube.com/watch?v=0eaWHUMjgqk
  • 54m35s

Lisa Randall

More Details about the concept of curvature in mathematics:

The clever way curvature is described in math

Mathemaniac

Aug 2, 2024

• https://www.youtube.com/watch?v=UYiAlYlSwBo
  • 16m16s

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