Why is Time a One-Way Street?
Why Hacker News recommends it
HN commenters recommend it as a clear explanation of why time runs one way, from a leading physicist.
What it is
Leonard Susskind's Santa Fe Institute talk on the arrow of time: why the past differs from the future when physics equations are time-symmetric. He covers entropy, cosmology and Boltzmann brains.
Recommended by 2 HN commenters across 2 different months, 2014 to 2022.
What Hacker News said
Strong rec dave809 · 2014-06 · on “The Disappearing Universe”
Leonard Susskind talked about this idea and expanded on it in his talk 'Why is time a one way street' Highly recommend the talk. [this video]
Recommends WindyLakeReturn · 2021-04 · on “The Expansion of the Universe”
One interesting question of this is if science changes once the other galaxy groups disappear. By that I mean if a human was to redo all previous experiments have we lost any data that would result in us building a different model of the universe than what we've built with the other galaxy groups present. Sure, we will have records of evidence from the past, but records of evidence from experiments that can no longer be repeated is no longer reliable data. This is ignoring the whole development of humanity and science in the intervening 150 billion years which may change what options are available to use then. I'm also not sure if this is the most up to date model of the universe. I've recen
Cites superb-owl · 2022-10 · on “A Soviet circus clown tried to prove that dogs can be psychic”
Here's a clip from physicist Leonard Susskind where he discusses some "psychic" experiences with a Russian colleague. He offers a pretty good mundane explanation, but it's still pretty incredible. [this video]