Notes From: A Brief History Of Time

For every single book that I read, I take notes on everything that I want to remember. Hundreds and hundreds of books (at the time of this writing), and notes on each one.

I never intended to sell these notes or package them in a totally comprehensive way, so some books go further in depth than some professional book summaries, and some not so deep at all.

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But they are just what I personally have taken from each book, and I hope that they have some value for you.

I have turned them into a product which I sell in return for donations to Doctors Without Borders.

But I’ve decided to release some of my notes periodically on my site, for free.

 


From Amazon:

A landmark volume in science writing by one of the great minds of our time, Stephen Hawking’s book explores such profound questions as: How did the universe begin—and what made its start possible? Does time always flow forward? Is the universe unending—or are there boundaries? Are there other dimensions in space? What will happen when it all ends?


 

A Brief History Of Time:

 

It is impossible to have an infinite static model of the universe in which gravity is always attractive

 

The concept of time has no meaning before the beginning of the universe

 

“Time is a property of the universe that God created”

 

Each person has their own version of time depending on where they are and how they are moving

 

There is no unique absolute time

 

Eventually, the orbit of the earth will shrink enough so that it collides with the sun

 

The total number of black holes is unknown and may even be almost as many as visible stars

 

Space-time may be finite, and therefore having no boundary and no beginning

 

The total energy of the universe is exactly zero

 

There are thermodynamic, psychological, and cosmological arrows of time and they each point the same way

 

Intelligent life could not exist in the contracting phase of the universe

 

Food is in the ordered state, and eating food converts it to energy in the disordered form

 

More or fewer dimensions would mean that we could not exist

 

God changing his mind would mean that he is a being existing in time, instead of being the creator of time and outside of it

 

The fact that gravity is always attractive means that the universe is either expanding or contracting

 

Why does the universe go to all the trouble of existing?

 


So there you have it. My notes from one of the best-known works of the great Stephen Hawking.

I hope they sparked your interest, or led to some new questions, or just made your life better in some way.

If they did, I’d love for you to consider donating to the phenomenal international non-profit, Doctors Without Borders. We operate all over the world, proving free medical services to those hardest hit by war, famine, and other disasters and atrocities. We never discriminate on the basis of gender, religion, ethnicity, etc. And we would be honored to receive your support.

AUTHOR BIO:

Matt Karamazov is a human rights activist, boxer, and writer who reads 200 books per year and throws 300 punches per minute. His website, Godlike Discipline, is dedicated to raising money for causes like Doctors Without Borders, and Human Rights Watch, among others. It’s also dedicated to helping people tackle their biggest willpower challenges. He also like death metal, and so, consequently doesn’t get many second dates. Here he is on a horse.

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