Quotes from Stephen Hawking

On what he thinks about all day "Women. They are a complete mystery.

Segunda ley de la termodinámica]. Según esta ley, el desorden o la entropía aumenta siempre con el tiempo. En otras palabras, se trata de una forma de la ley de Murphy: las cosas van a peor.

in about 5600 BC the Mount Mazama volcano in Oregon erupted, raining rock and burning ash for years, and leading to the many years of rainfall that eventually filled the volcanic crater today called Crater Lake.

calculations show that a change of as little as 0.5 percent in the strength of the strong nuclear force, or 4 percent in the electric force, would destroy either nearly all carbon or all oxygen in every star, and hence the possibility of life as we know it. Change those rules of our universe just a bit, and the conditions for our existence disappear!

If nature is governed by laws, three questions arise: What is the origin of the laws? Are there any exceptions to the laws, i.e., miracles? Is there only one set of possible laws?

What is it that breathes fire into the equations and makes a universe for them to describe?

Yet if there really is a complete unified theory, it would also presumably determine our actions. And so the theory itself would determine the outcome of our search for it!

In fact, if general relativity were not taken into account in GPS satellite navigation systems, errors in global positions would accumulate at a rate of about ten kilometers each day!

real science can be far stranger than science fiction, and much more satisfying.

time and space are intertwined. It is something like adding a fourth direction of future/past to the usual left/right, forward/backward, and up/down. Physicists call this marriage of space and time "space-time," and because space-time includes a fourth direction, they call it the fourth dimension.

if you take a positivist position, as I do, questions about reality don't have any meaning. All one can ask is whether imaginary time is useful in formulating mathematical models that describe what we observe.

region of space-time known as a black hole.

The nonexistence of absolute rest therefore meant that one could not give an event an absolute position in space, as Aristotle had believed.

There is no way to remove the observer—us—from our perception of the world

AFEW YEARS AGO the city council of Monza, Italy, barred pet owners from keeping goldfish in curved goldfish bowls. The measure's sponsor explained the measure in part by saying that it is cruel to keep a fish in a bowl with curved sides because, gazing out, the fish would have a distorted view of reality.

complete, consistent, unified theory is only the first step: our goal is a complete understanding of the events around us, and of our own existence

Burada vurgulamak istediÄŸim ÅŸudur: kara delikler tamamen kara deÄŸildir. Daha önce zannedildiÄŸi gibi bunlar ebedi hapishaneler deÄŸildir. Kara deliklerden bir ÅŸeyler kaçabilir, hem bu evrene hem de belli bir olas?l?kla baÅŸka bir evrene. O zaman eÄŸer bir kara deliÄŸin içindeyseniz umutsuzluÄŸa kap?lmay?n, d??ar? ç?k?? olanakl?d?r!

We are not about to build particle accelerators that can probe to distances that small. They would have to be larger than the solar system and they are not likely to be approved in the present financial climate.

Today we still yearn to know why we are here and where we came from. Humanity's deepest desire for knowledge is justification enough for our continuing quest. And our goal is nothing less than a complete description of the universe we live in.

The Aristotelian tradition also held that one could work out all the laws that govern the universe by pure thought:

we already knew that nothing could prevent a massive cold star from collapsing under its own gravity until it reached a singularity of infinite density. I realised that similar arguments could be applied to the expansion of the universe.

If there are beings alive on Alpha Centauri today, they remain blissfully ignorant of the rise of Donald Trump. It

This is known as the twins paradox, but it is a paradox only if one has the idea of absolute time at the back of one's mind. In the theory of relativity there is no unique absolute time, but instead each individual has his own personal measure of time that depends on where he is and how he is moving.

Newton realized that, according to his theory of gravity, the stars should attract each other