Brian Greene - What Was There Before The Big Bang?

The American theoretical physicist, Brian Greene explains various hypotheses about the causation of the big bang. Brian Greene is an excellent science communicator and he makes complex cosmological concepts more easy to understand.

The Big Bang explains the evolution of the universe from a starting density and temperature that is currently well beyond humanity's capability to replicate. Thus the most extreme conditions and earliest times of the universe are speculative and any explanation for what caused the big bang should be taken with a grain of salt. Nevertheless that shouldn't stop us to ask questions like what was there before the big bang.

Brian Greene mentions the possibility that time itself may have originated with the birth of the cosmos about 13.8 billion years ago.

To understand how the Universe came to be, scientists combine mathematical models with observations and develop workable theories which explain the evolution of the cosmos. The Big Bang theory, which is built upon the equations of classical general relativity, indicates a singularity at the origin of cosmic time.

However, the physical theories of general relativity and quantum mechanics as currently realized are not applicable before the Planck epoch, which is the earliest period of time in the history of the universe, and correcting this will require the development of a correct treatment of quantum gravity.

Certain quantum gravity treatments imply that time itself could be an emergent property. Which leads some physicists to conclude that time did not exist before the Big Bang. While others are open to the possibility of time preceding the big bang.

One of the common misconceptions about the Big Bang model is that it fully explains the origin of the universe. However, the Big Bang model does not describe how energy, time, and space were caused, but rather it describes the emergence of the present universe from an ultra-dense and high-temperature initial state. It is misleading to visualize the Big Bang by comparing its size to everyday objects. When the size of the universe at Big Bang is described, it refers to the size of the observable universe, and not the entire universe.

#bigbang #bgreene #science

Sources:

"Brian Greene no Fronteiras do Pensamento Porto Alegre 2014" by fronteirasweb is licensed under CC BY-SA 2.0

[bitheroes]

Shoutout to the universe for makng this video possible.

[Justatoy]

This really pulls you back into how overwhelming the thought is of the universe and space really is.

[Crissss]

Believe it or not watching these videos is the only way I can fall asleep.

[shawnstatzer]

And the most interesting part for me, is that we are the conscious part of the universe reflecting upon itself.

[Ok-bvkk]

I wish people would be more excited to learn science instead of social media and celebrities

[linslins]

Massive respect to the camera device who survived this Big bang and delivered to us a wonderful footage.

[gunslinger-hxcm]

I live in Russia and I am suffering from schizophrenia and anxiety on daily basis atmosphere here is always haunted rainy and snowy but when I listen to these type of videos I get a sense of relief and feels good ...that's why I wanna be a astrophysicist

[artykillen]

Fair play to Brian Greene for standing on that accretion disk, not many men would have the balls to do so.

[robguitarwizard]

It's a good thing that someone was there to film it all!

[quantumonions]

Before the Big Bang there existed a mythical age called "The Good Ole Days"

[thetrappedchatterbox]

What's equally as fascinating as our understanding of the universe is our grasp of English. I don't understand 94% of what was said in this amazing video.

[brauckstar]

I am convinced that our universe was made by alternate universe scientists trying to understand the big bang

[ThePixelExpedition]

The animation of these temporal phenomena is breathtaking. I love Brian Greene's ability to clearly describe theory and process in the simplest terms. Amazing video!

[antr]

I think it is important to be mindful that when we ask the question: "What was there before the big bang?" We are basically saying: "What reality existed before the reality we are familiar with?" Which is the space-time continuum. I think scientifically it is almost impossible to answer this question because we are only familiar with our current dimension, we can only especulate about it which is part of our curiosity. Additionally when we ask this question we are always forced to ask: "What was there before that and before that and before that ....etc" which will ultimately always lead to infinitum, something without beginning or end. Can our 3 pound brain ever comprehend that?

[jermainerucker]

It’s always sobering to take a step back and recall how fascinating the universe is. From the cosmos, to the depths of the deepest oceans. To the roots of antiquity to studies of the paranormal.

[wamatar]

God was always there no beginning, and no ending . 🙏

[blocksterz]

Beginning and the end are just human concepts created by us living on this one grain of sand, probably that's why we can't understand what was there in the "beginning"

[JoshyStuart]

7:34 "the big bang was an interesting event, but not the first..."

Whenever I hear this and think about an infinite regress of universes/multiverses/turtles, I have this flash of "this is fucking crazy".

[mjwoss]

any chance you could address the question posed in the title of the video, i.e. "before" the big bang ... rather than just have another video describing what happened in the stages after it?

[nairdaboss]

The animation of this is amazing. I’ve spent countless hours watching universe videos and most are very hard to visualize, but this helps a lot. Still needs work, but the endeavor is visible