Quotes from Carlo Rovelli

Heisenberg had understood that you can't locate a particle at a point in space for long: it soon escapes. The smaller the region where we try to locate a particle, the greater the velocity at which it escapes.

Color as we perceive it is our psychophysical reaction of the nerve signal generated by the receptors of our eyes, which distinguish electromagnetic waves of different frequencies.

The search for knowledge is not nourished by certainty: it is nourished by a radical absence of certainty.

This means we can say that on Mars there are events that in this precise moment have already happened, events that are yet to happen, but also a quarter-of-an-hour of events during which things occur that are neither in our past nor in our future.

Here, in the vanguard, beyond the borders of knowledge, science becomes even more beautiful—incandescent in the forge of nascent ideas, of intuitions, of attempts. Of roads taken and then abandoned, of enthusiasms. In the effort to imagine what has not yet been imagined.

In technical terms, we say that Einstein has understood that "absolute simultaneity" does not exist: there is no collection of events in the universe that exist "now.

You don't get anywhere by not 'wasting' time – something, unfortunately, which the parents of teenagers tend frequently to forget.

But there are not just two times. Times are legion: a different one for every point in space. There is not one single time; there is a vast multitude of them.

That which seems intuitive to us now is the result of scientific and philosophical elaborations in the past.

There is no preferred direction of time without heat.

The events of the world do not form an orderly queue, like the English. They crowd around chaotically, like Italians.

A science that closes its ears to philosophy fades into superficiality; a philosophy that pays no attention to the scientific knowledge of its time is obtuse and sterile. It betrays its own deepest roots, which are evident in the etymology of philosophy: the love of knowledge.

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

The world is strange, but simple

The quanta of gravity, that is, are not in space; they are themselves space. The

For a hypothetically supersensible being, there would be no "flowing" of time: the universe would be a single block of past, present, and future.

we understand the world by studying change, not by studying things.

If LISA is launched, it should be able to see not only the gravitational waves produced by stars and black holes but also the diffuse background of primordial gravitational waves generated at a time close to the Big Bang. These waves should tell us about the quantum bounce. In the subtle irregularities of space, we should be able to find traces of events that took place fourteen billion years ago, at the origin of our universe, and confirm our deductions on the nature of space and time.

And there is the fact that what matters is not how things are, but rather how they interact. Spin networks are not entities; they describe the effect of space upon things. Just as an electron is in no place-is diffused in a cloud of probability in all places-space is not actually forned by a single specific spin network, but rather by a cloud of probabilities over the whole range of all possible spin networks.

Two nodes connected by a link are two nodes in proximity. They are two grains of space in contact with each other: this "touching" constructs the structure of space.

Faraday ve Maxwell, Newton'un so?uk dünyas?na yeni bir unsur katt?: elektromanyetik alan. Her yere yay?lm??, radyo dalgalar?n? ta??yan, uzay? dolduran, bir gölün yüzeyi gibi titre?ip dalgalanabilen ve elektrik kuvvetini "ta??yan" bu alan, gerçek bir olguydu.

La forza che tiene incollati i quarks all'interno dei protoni e dei neutroni è generata da particelle che i fisici, con poco senso del ridicolo, chiamano «gluoni», dall'inglese glue, colla. In italiano si tradurrebbe «colloni», ma fortunatamente usano tutti il nome inglese.

The granular discrete structure of space resolves the difficulties of the quantum theory of fields, eliminating the infinities by which it is afflicted.

La precariedad de la verdad no implica que no podamos ponernos de acuerdo.