Quotes from Carlo Rovelli

But it is not only space that curves: time does too. Einstein predicts that time on Earth passes more quickly at higher altitude, and more slowly at lower altitude.

We see the sky turning around us every day, but we are the ones who are turning. Is the daily spectacle of a revolving universe "illusory"? No, it is real, but it doesn't involve the cosmos alone. It involves our relation with the sun and the stars. We understand it by asking ourselves how we move. Cosmic movement emerges from the relation between the cosmos and ourselves.

Newton nesnelerin uzayda hareket etti?ini, uzay?n da bo? bir kap, evren için büyük bir kutu oldu?unu hayal etmi?ti. Newton taraf?ndan icat edilen bu "uzay"?n, dünyan?n kutusunun neden yap?ld??? da belli de?ildi.

order to these baffling aspects of behavior in the atomic world, and to build from it a coherent theory. In 1925

La Natura si sta comportando con noi come quell'anziano rabbino da cui erano andati due uomini per dirimere una contesa. Ascoltato il primo, il rabbino dice: "Hai ragione". Il secondo insiste per essere ascoltato, il rabbino lo ascolta e gli dice: "Hai ragione anche tu". Allora la moglie del rabbino, che orecchiava da un'altra stanza, urla: "Ma non possono avere ragione entrambi!". Il rabbino ci pensa, annuisce, e conclude: "Anche tu hai ragione".

In our everyday life we move at low speeds in relation to the speed of light and so we do not perceive the discrepancies between the different proper times of different clocks, and the differences in speed at which time passes at different distances from a mass are too small for us to distinguish. In the end, therefore, instead of many possible times, we can speak only of a single time: the time of our experience—uniform, universal, and ordered.

Kütle çekim alan? uzayda yay?lm?? de?ildi, çekim alan? uzay?n ta kendisiydi.

The difference between past and future exists only when there is heat. The fundamental phenomenon that distinguishes the future from the past is the fact that heat passes from things that are hotter to things that are colder.

Lo que nos hace avanzar es la duda y no la certeza.

Uzay maddenin var olduÄŸu yerde eÄŸrilir.

Ama bükülen yaln?zca uzay de?ildir; zaman da bükülür. Einstein zaman?n yüksekteki bir konumda, dünyaya yak?n, daha alçak bir durumdan daha h?zl? akt???n? öngörür.

It is not against nature to be curious: it is in our nature to be so. One

The quanta of gravity, that is, are not in space; they are themselves space. The spin networks that describe the quantum structure of the gravitational field are not immersed in space, they do not inhabit a space. The location of single quanta of space is not defined with regard to something else, but only by the links, and the relation these express.

Lucretius expresses this, wonderfully: . . . we are all born from the same celestial seed; all of us have the same father, from which the earth, the mother who feeds us, receives clear drops of rain, producing from them bright wheat and lush trees, and the human race, and the species of beasts, offering up the foods with which all bodies are nourished, to lead a sweet life and generate offspring . . . (De rerum natura, bk. II, lines 991–97) It

The growth of entropy is nothing other than the ubiquitous and familiar natural increase of disorder.

If by "time" we mean nothing more than happening, then everything is time. There is only that which exists in time.

This is what Boltzmann understood. The difference between past and future does not lie in the elementary laws of motion; it does not reside in the deep grammar of nature. It is the natural disordering that leads to gradually less particular, less special situations.

There's an amphora of old wine in the house of nine years' vintage. There is in the garden, Phyllis, laurel for braiding crowns and much ivy . . . I invite you to celebrate this day in mid-April— a festive one for me, dearer than my own birthday. (IV,

Ever since we discovered that Earth is round and turns like a mad spinning-top, we have understood that reality is not as it appears to us: every time we glimpse a new aspect of it, it is a deeply emotional experience. Another veil has fallen.

For the first time in the history of mankind, an experiment is made. Experimental science begins with Galileo.

When we do science, we want to describe the world in the most objective way possible. We try to eliminate distortions and optical illusions deriving from our point of view. Science aspires to objectivity, to a shared point of view about which it is possible to be in agreement.

Or if they share any other characteristic. If we think about it carefully, every configuration is particular, every configuration is singular, if we look at all of its details, since every configuration always has something about it that characterizes it in a unique way. Just as, to its mother, every child is particular and unique.

Color is the speed at which Faraday's lines vibrate, and this is determined by the vibrations of the electric charges that emit light.

The Mathematical Principles of Natural Philosophy, or Principia, the book that founded modern science.