Brian Cox Quotes

We are the cosmos made conscious and life is the means by which the universe understands itself.

The problem with today’s world is that everyone believes they have the right to express their opinion AND have others listen to it. The correct statement of individual rights is that everyone has the right to an opinion, but crucially, that opinion can be roundly ignored and even made fun of, particularly if it is demonstrably nonsense!

You dig deeper and it gets more and more complicated, and you get confused, and it's tricky and it's hard, but... It is beautiful.

Every carbon atom in every living thing on the planet was produced in the heart of a dying star.

We explore because we are curious, not because we wish to develop grand views of reality or better widgets.

In science, there are no universal truths, just views of the world that have yet to be shown to be false.

The practice of science happens at the border between the known and the unknown. Standing on the shoulders of giants, we peer into the darkness with eyes opened not in fear but in wonder.

The ultimate paradox, of course, is that even though we're all going to die, we've all got to live in the meantime…

I'm comfortable with the unknown -- that's the point of science. There are places out there, billions of places out there, that we know nothing about. And the fact that we know nothing about them excites me, and I want to go out and find out about them. And that's what science is. So I think if you’re not comfortable with the unknown, then it’s difficult to be a scientist… I don’t need an answer. I don’t need answers to everything. I want to have answers to find.

We're both clever and stupid in equal measure.

Light is the only connection we have with the Universe beyond our solar system, and the only connection our ancestors had with anything beyond Earth. Follow the light and we can journey from the confines of our planet to other worlds that orbit the Sun without ever dreaming of spacecraft. To look up is to look back in time, because the ancient beams of light are messengers from the Universe's distant past.

(On the energy radiated by the Sun) It's four hundred million million million million watts. That is a million times the power consumption of the United States every year, radiated in one second, and we worked that out by using some water, a thermometer, a tin, and an umbrella. And that's why I love physics.

United States spends more on pet grooming than it does on fusion research.

[Real scientist are delighted when they find out they are wrong. And to me that is one of the greatest gifts that a scientific education can bring.] There are too many people in this world who want to be right. And too few who just want to know.

Life, just like the stars, the planets and the galaxies, is just a temporary structure on the long road from order to disorder. But that doesn't make us insignificant, because we are the Cosmos made conscious. Life is the means by which the universe understands itself. And for me, our true significance lies in our ability to understand and explore this beautiful universe.

Astronomy is what we have now instead of theology. The terrors are less, but the comforts are nil’.

I'm not anti-religion. I'm anti-maniac.

Heisenberg’s Uncertainty Principle is one of the most misunderstood parts of quantum theory, a doorway through which all sorts of charlatans and purveyors of tripe8 can force their philosophical musings.

So if we assume we are not the only civilisation in the galaxy, then at least a few others must have arisen billions of years ahead of us. But where are they?

It is undoubtedly true that Galileo didn’t intend to challenge the very theological foundations of the Church of Rome by observing the Moon through a telescope. But scientific discoveries, however innocuous they may seem at first sight, have a way of undermining those who don’t much care for facts. Reality catches up with everyone eventually. With

...Heisenberg removed the conceit that the workings of Nature should necessarily accord with common sense.

One of the great joys of science is to understand something for the first time–to really understand, which is very different from, and far more satisfying than, knowing the facts.

Look at any randomly selected piece of your world. Encoded deep in the biology of every cell in every blade of grass, in every insect’s wing, in every bacterium cell, is the history of the third planet from the Sun in a Solar System making its way lethargically around a galaxy called the Milky Way. Its shape, form, function, colour, smell, taste, molecular structure, arrangement of atoms, sequence of bases, and possibilities for the future are all absolutely unique. There is nowhere else in the observable Universe where you will see precisely that little clump of emergent, living complexity. It is wonderful.

The scientific creation story has majesty, power and beauty. and is infused with a powerful message capable of lifting our spirits in a way that its multitudinous supernatural counterparts are incapable of matching. It teaches us that we are the products of 13.7 billion years of cosmic evolution and the mechanism by which meaning entered the universe, if only for a fleeting moment in time. Because the universe means something to me, and the fact that we are all agglomerations of quarks and electrons in a complex and fragile pattern that can perceive the beauty of the universe with visceral wonder, is, I think, a thought worth raising a glass to this Christmas.

If there is one thing we try to teach our students when they first arrive at the University of Manchester, ready to learn to be physicists, it is that everyone gets confused and stuck. Very few people understand difficult concepts the first time they encounter them, and the way to a deeper understanding is to move forward with small steps. In the words of Douglas Adams: 'Don’t panic!

Science is most definitely not a priesthood where people stand on a mountain and pass truths down to the waiting minions below.

Perhaps we should not be too surprised that nature sometimes appears counterintuitive to a tribe of observant, carbon-based ape descendants roaming around on the surface of a rocky world orbiting an unremarkable middle-aged star at the outer edge of the Milky Way galaxy.

The division into hundreds of countries whose borders and interests are defined by imagined local differences and arbitrary religious dogma, both of which are utterly irrelevant and meaningless on a galactic scale, must surely be addressed if we are to confront global problems such as mutually assured destruction, asteroid threats, climate change, pandemic disease and who knows what else, and flourish beyond the twenty-first century. The very fact that the preceding sentence sounds hopelessly utopian might provide a plausible answer to the Great Silence.

Thoughts, feelings, hopes and dreams exist on Earth because of electrical activity inside a 1.5-kilogram blob of stuff, which hasn’t changed much since the earliest modern humans began the long journey out of Africa

Our experience teaches us that there are indeed laws of nature, regularities in the way things behave, and that these laws are best expressed using the language of mathematics. This raises the interesting possibility that mathematical consistency might be used to guide us, along with experimental observation, to the laws that describe physical reality, and this has proved to be the case time and again throughout the history of science. We will see this happen during the course of this book, and it is truly one of the wonderful mysteries of our universe that it should be so.

Two and a half million years ago, when our distant relative Homo habilis was foraging for food across the Tanzanian savannah, a beam of light left the Andromeda Galaxy and began its journey across the Universe. As that light beam raced across space at the speed of light, generations of pre-humans and humans lived and died; whole species evolved and became extinct, until one member of that unbroken lineage, me, happened to gaze up into the sky below the constellation we call Cassiopeia and focus that beam of light onto his retina. A two-and-a-half-billion-year journey ends by creating an electrical impulse in a nerve fibre, triggering a cascade of wonder in a complex organ called the human brain that didn’t exist anywhere in the Universe when the journey began.

The waterfall says yes

Things inexorably get worse.

[All good research scientists understand that] no position is unassailable. There are no absolute truth in science. Authority counts for nothing when contradicted by nature.

One of the beautiful things about mathematical physics is that equations contain stories.

The true spirit of delight, the exaltation, the sense of being more than Man, which is the touchstone of the highest excellence, is to be found in mathematics as surely as in poetry.

You are exporting disorder [in the form of heat into the Universe] now as you read this book. You are hastening the demise of everything that exists, bringing forward by your very existence the arrival of time known as the heat death, when all stars have died, all black holes have evaporated away and the entirety of creation is a uniform bath of photons incapable of storing a single bit of information about the glorious adolescence of our wonderful Universe.

To me, and to the participants of at the Green Bank conference, the idea that a civilization might destroy itself is both ludicrous and likely. We are pathetically inadequate at long-term planning, idiotically primitive in our destructive urges and pathologically incapable of simply getting along.

That dizzying feeling of confusion, if (hopefully) followed by an epiphany of clarity, is the joy of science. If the reader is feeling the former, we hope to deliver the latter by the end of the book.

The current worldview is never claimed to be correct, in the very important sense that there are no absolute truths in science. The body of scientific knowledge at any point in history, including now, is simply the collection of theories and views of the world that have not yet been shown to be wrong.

a prerequisite for the creation of the intellectual edifice upon which your spreadsheets, air-conditioned offices and mobile phones rest was the curiosity-driven quest to understand the motions of the planets and the Earth’s place amongst the stars.

Science is delighted frustration. It is about asking questions, to which the answers may be unavailable – now, or perhaps ever. It is about noticing regularities, asserting that these regularities must have natural explanations and searching for those explanations.

The trick as an educated citizen of the twenty-first century is to realise that Nature is far stranger and more wonderful than human imagination, and the only appropriate response to new discoveries is to enjoy one’s inevitable discomfort, take delight in being shown to be wrong and learn something as a result.

Did you know we are all here but not and all exist but are made of nothing and are part if the life's waterfall

Art cannot be limited by temporal aberations

You have to get old because of the geometry of spacetime.

most southerly rising point occurs at

Michael Faraday, the son of a Yorkshire blacksmith, was born in south London in 1791. He was self-educated, leaving school at fourteen to become an apprentice bookbinder. He engineered his own lucky break into the world of professional science after attending a lecture in London by the Cornish scientist Sir Humphry Davy in 1811. Faraday sent the notes he had taken at the lecture to Davy, who was so impressed by Faraday’s diligent transcription that he appointed him his scientific assistant. Faraday went on to become a giant of nineteenth-century science, widely acknowledged to have been one of the greatest experimental physicists of all time. Davy is quoted as saying that Faraday was his greatest scientific discovery.

Common sense is completely worthless and irrelevant when trying to understand reality. This is probably why people who like to boast about their common sense tend to rail against the fact that they share a common ancestor with a monkey.

I believe powerfully that we who have the power should strive to extend the gift of education to everyone. Education is the most important investment a developed society can make, and the most effective way of nurturing a developing one.

questions by doing science. We will observe, measure and think. One of the great joys of science is to understand something for the first time–to really understand, which is very different from, and far more satisfying than, knowing the facts.

ideas are the lifeblood of civilisation, and societies assimilate ideas and become comfortable with their implications through understanding and debate. If eternal inflation is the correct description of our universe, it will be the artists, philosophers, theologians, novelists and musicians, alongside the physicists, who explore its meaning. What does it mean if the existence of our universe is inevitable? What does it mean if we are not special in any way? What does it mean if our observable universe, with all its myriad galaxies and possibilities, is a vanishingly small leaf on an every-expanding fractal tree of universes? What does it mean if you are, because you have to be? I can’t tell you. I can only ask – what does it mean to you?

I held a brain for the cameras at St Paul’s teaching hospital in Addis. It is the most complex single object in the known universe, a most intricate example of emergent complexity assembled over 4 billion years by natural selection operating within the constraints placed upon it by the laws of physics and the particular biochemistry of life on Earth. It contains around 85 billion individual neurons, which is of the same order as the number of stars in an average galaxy. But that doesn’t begin to describe its complexity. Each neuron is thought to make between 10,000 and 100,000 connections to other neurons, making the brain a computer way beyond anything our current technology can simulate. When we do manage to simulate one, I have no doubt that sentience will emerge; consciousness is not magic, it is an emergent property consistent with the known laws of nature.

They would certainly have been simpler than the earliest known microbial mats, but somewhere in your genome there will be sequences of DNA that have been faithfully passed down across the great sweep of geological time, and if you have children, you’ll pass these four-billion-year-old messages on to them.

I deliberately borrow from Shakespeare; the most precious objects on Earth are not gems or jewels, but ink marks on paper. No single human brain could conceive of Hamlet, Principia Mathematica or Codex Leicester; they were created by and belong to the entire human race, and the library of wonders continues to grow.

A full explanation of this is beyond the scope of this book, suffice to say that Einstein was forced into this bold move primarily because Maxwell’s equations for electricity and magnetism were incompatible with Newton’s 200-year-old laws of motion. Einstein abandoned the Newtonian ideas of space and time as separate entities and merged them. In Einstein’s theory there is a special speed built into the structure of spacetime itself that everyone must agree on, irrespective of how they are moving relative to each other. This special speed is a universal constant of nature that will always be measured as precisely 299,792,458 metres (983,571,503 feet) per second, at all times and all places in the Universe, no matter what they are doing. This

Building on these ideas, my view is that we humans represent an isolated island of meaning in a meaningless universe, and I should immediately clarify what I mean by meaningless. I see no reason for the existence of the universe in a teleological sense; there is surely no final cause or purpose. Rather, I think that meaning is an emergent property; it appeared on Earth when the brains of our ancestors became large enough to allow for primitive culture – probably between 3 and 4 million years ago with the emergence of Australopithecus in the Rift Valley. There are surely other intelligent beings in the billions of galaxies beyond the Milky Way, and if the modern theory of eternal inflation is correct, then there is an infinite number of inhabited worlds in the multiverse beyond the horizon.

گفته مي شود ستاره شناسي دانشي است كه در عين شخصيت ساز بودن به انسان درس فروتني مي دهد. شايد براي نشان دادن مسخرگي باورهاي فريب آميز انسان ها راهي بهتر از نگريستن به تصوير دور اين دنياي خرد نباشد. اين نشان مي دهد كه وظيفه داريم نسبت به هم مهربان تر باشيم و زمين مان را حفظ كرده و گرامي بداريم چون تنها منزلي است كه تاكنون شناخته ايم." #كارل_ساگان#برايان_كاكس.. بخشي از كتاب: #شگفتي_هاي_كيهان#انتشارات_مازيار..

Scientists would much rather contemplate indeterminism than free will because then they can continue to avoid any notion of mind existing in its own right. The entire way scientists think is predicated on ensuring that meaning, purpose, mind, teleology, and free will never enter their thoughts or theories. It’s literally verboten to allow these to enter science. Science is an ideology. It’s utterly dogmatic. It has an absolutely rigid and wrong worldview that it refuses to alter. It’s as bad as Judaism, Christianity, Islam and Karmism. The way Richard Dawkins, Stephen Hawking, Sam Harris and Brian Cox contemplate the world is from the primary assumption that mind, teleology and free will are false. So, it’s no surprise whatsoever to find these people arguing against mind, teleology and free will. They have to in order to cling to their quasi-religious faith in scientific materialism.

Are you ready to release Millie Harrison?" "We don't negotiate with terrorists." "I'm not a terrorist." I said it tiredly. "Besides, that's bullshit. The U.S. has always negotiated  with terrorists, no matter what it's said. Why do you think we sold arms to Iran?" "Release Brian Cox. We'll think about it." "Millie Harrison is being illegally held. Brian Cox kidnapped her. Who is the terrorist? Who is  attacking the innocent? Release her and I'll give you back Cox." I hung up.

Imagine that light is shining out from a flashlight. According to common sense, if we run fast enough we could in principle catch up with the front of the beam of light as it advances forward. Common sense might even suggest that we could jog alongside the front of the beam if we managed to run at the speed of light. But if we are to follow Maxwell’s equations to the letter, then no matter how fast we run, the beam still recedes away from us at a speed of 299,792,458 meters per second.

Our existence is a ridiculous affront to common sense, beyond any reasonable expectation of the possible based on the simplicity of the laws of nature, and our civilisation is the combination of seven billion individual affronts. This is what my smiling seems to say: Man certainly does delight me. Our existence is necessarily temporary and our spatial reach finite, and this makes us all the more precious. Mahler’s great farewell to life can also be read as a call to value life with all your heart, to use it wisely and to enjoy it while you can.

We must come to terms with being of no cosmic significance, and this means jettisoning our personal and collective egos and valuing what we have. We can no longer assume the platform of gods, or dream of a unique place in their hearts. Science has forced us to look fixedly into an infinite universe, and its volume dilutes special pleading to a vanishingly small and pathetic whimper. And yet what’s left is better. No monument to the gods is as magnificent as the story of our planet; of the origin and evolution of life on the rare Earth and the rise of a fledgling civilisation taking its first steps into the dark. We stand related to every one of Darwin’s endless, most beautiful forms, each of us connected at some branch in the unbroken chain of life stretching back 4 billion years. We share more in common with bacteria than we do with any living things out there amongst the stars, should they exist, and they are more worthy of our attention. Build cathedrals in praise of bacteria; we are on our own, and as the dominant intellect we are responsible for our planet in its magnificent and fragile entirety.

Later, we shall see that if it were possible to exceed the speed of light, we could construct time machines capable of transporting us backward through history to any point in the past. We could imagine journeying back to a time before we were born and, by accident or design, preventing our parents from ever meeting. This makes for excellent science fiction, but it is no way to build a universe, and indeed Einstein found that the universe is not built like this. Space and time are delicately interwoven in a way that prevents such paradoxes from occurring.

The last remaining matter in the universe will reside within black dwarves. We can predict how they will end their days. The last matter of the universe will evaporate away and be carried off into the void as radiation leaving absolutely nothing behind. There won’t be a single atom left; all that’s left will be particles of light and black holes. After an unimaginable period even the black holes will have evaporated; the universe will be nothing but a sea of photons gradually tending to the same temperature as the expansion of the universe cools them towards absolute zero. The story of the universe will come to an end. For the first time in its life the universe will be permanent and unchanging. Entropy will finally stop increasing because the cosmos cannot get any more disordered. Nothing happens and it keeps not happening for ever. There is no difference between past present and future, nothing changes, arrow of time has simply ceased to exist. It is an inescapable fact written into the laws of physics that entire cosmos will die; all the stars will go out extinguishing possibility of life in the universe.

Putting the question to one side for a moment, the human experiment can be labelled as… disappointing. But as a species, we are, at times, exceedingly vulnerable. Our vulnerability lies in the inability to understand life and its purpose. We hunt for the tools to make sense of it all: religion, science, politics, sport, the theatre. We explore and search for meaning by discovering new worlds and climbing mountains, and a great many of us find tremendous solace and comfort in these activities, but the one thing that is absolutely certain is that we are born and that we will die. The rest is propaganda.

Science is a time machine, and it goes both ways. We are able to predict our future with increasing certainty. Our ability to act in response to these predictions will ultimately determine our fate. Science and reason make the darkness visible. I worry that lack of investment in science and a retreat from reason may prevent us from seeing further, or delay our reaction to what we see, making a meaningful response impossible. There are no simple fixes. Our civilisation is complex, our global political system is inadequate, our internal differences of opinion are deep-seated. I’d bet you think you’re absolutely right about some things and virtually everyone else is an idiot. Climate Change? Europe? God? America? The Monarchy? Same-sex Marriage? Abortion? Big Business? Nationalism? The United Nations? The Bank Bailout? Tax Rates? Genetically Modified Crops? Eating Meat? Football? X Factor or Strictly? The way forward is to understand and accept that there are many opinions, but only one human civilisation, only one Nature, and only one science. The collective goal of ensuring that there is never less than one human civilisation must surely override our personal prejudices. At least we have come far enough in 40,800 years to be able to state the obvious, and this is a necessary first step.

What's interesting about if you look at the basic physics of the universe going from the Big Bang to where we are today, then the physics is driven by the fact that the universe began in an extremely ordered state. See, it was a very highly ordered system. And it is tending towards a more disordered system at the moment. And that's called the second law of thermodynamics. What we strongly suspect, and I would say know, is that in that processes of going from order to disorder, complexity emerges naturally for a brief period of time. So it's a natural path that in the evolution of the universe you get period in time where there's complexity is the universe - stars, and planets, and galaxies, and light, and civilisations. But they exist because the universe is decaying, not in spite of the fact that the universe is decaying. So our existence in that sort of picture is necessarily finite and necessarily time limited. And it is a remarkable thing that that complexity has gone so far, that there are things in the universe that can think, and feel, and explore it. And i think that is the answer. If you want an answer to the meaning of it all, it's that. That you are a part of the universe because of the ways the laws of nature work. You are allowed to exist, but you are allowed to exist for a temporary, small amount of time in a possible infinite universe.

It’s worth taking a brief pause here to ponder what has happened. Using only Pythagoras’ theorem and Einstein’s assumption about the speed of light being the same for everyone, we derived a mathematical formula that allowed us to predict the lengthening of the lifetime of a subatomic particle called a muon when that muon is accelerated around a particle accelerator in Brookhaven to 99.94 percent of the speed of light. Our prediction was that it should live 29 times longer than a muon standing still, and this prediction agrees exactly with what was seen by the scientists at Brookhaven. The more you think about this, the more wonderful it is. Welcome to the world of physics!

The Universe is always expanding.

Science is the enemy of the certain

Einstein's universe allows us to journey into the far future, while keeping the doors to the past firmly locked behind us

about our origins, our destiny, and our place in the universe. We have no right to expect answers; we have no right to even ask. But ask and wonder we do. Human Universe is first and foremost a love letter to humanity; a celebration of our outrageous fortune

Rutherford, Bohr, Planck, Einstein, Pauli, Heisenberg, Schrödinger, Dirac.

it only ever makes sense to speak of motion relative to something else.

we now suspect that Mercury, the innermost planet, began life much further out and was deflected inwards to its present-day seared orbit.

What has been is what will be, and what has been done is what will be done, and there is nothing new under the sun.

Four billion years ago, as life began on Earth, Mars was also Earth-like. It had oceans and rivers and active geology and complex surface chemistry; the ingredients of life.

Galileo would have been at home on Twitter.

Great Design Is All the Work You Don’t Ask People Who Use Your Product to Do —Rebekah Cox

By 1860, a great deal was known about electricity and magnetism. Magnets could be used to make electric currents flow, and flowing electric currents could deflect compass needles in the same way that magnets could. There was clearly a link between these two phenomena, but nobody had come up with a unified description. The breakthrough was made by the Scottish physicist James Clerk Maxwell, who, in a series of papers in 1861 and 1862, developed a single theory of electricity and magnetism that was able to explain all of the experimental work of Faraday, Ampère and others. But Maxwell’s crowning glory came in 1864, when he published a paper that is undoubtedly one of the greatest achievements in the history of science. Albert

Care is in order, because the very beginning – by which we mean the events that happened during the Planck epoch – the time period before a million million million million million million millionths of a second after the Big Bang, is currently beyond our understanding. This is because we lack a theory of space and time before this point, and consequently have very little to say about it. Such a theory, known as quantum gravity, is the holy grail of modern theoretical physics and is being energetically searched for by hundreds of scientists across the world. (Albert Einstein spent the last decades of his life searching in vain for it.) Conventional thinking holds that both time and space began at time zero, the beginning of the Planck era. The Big Bang can therefore be regarded as the beginning of time itself, and as such it was the beginning of the Universe.

I was able to demonstrate this for myself in the Vomit Comet armed with a model of Einstein. When we were weightless, I let a little plastic Albert float beside my head. One way of understanding why we floated next to each other is to simply state that we were both weightless, so we floated, but think about what this looks like from outside the plane. To someone on the ground looking up at us, the plane, myself and plastic Albert are all falling towards the ground under the action of Earth’s gravity, and obviously we are falling at the same rate. If I fell faster than Einstein, he wouldn’t float next to my head. Indeed, if the much more massive plane fell faster than both plastic Albert and myself, we’d both bump into the ceiling! The fact that we all floated around together is a beautiful demonstration of the fact that all objects, no matter what their mass, fall at the same rate in a gravitational field.

In engineering or medical science, a deep understanding of uncertainty can be a matter of life and death. In politics, over-confidence is often the norm; uncertainty is seen as weakness when really it is a vital part of decision making. In this respect, science delivers an important lesson in humility. In

The first experimental determination that the speed of light was not infinite was made by the seventeenth-century Danish astronomer, Ole Romer. In 1676, Romer was attempting to solve one of the great scientific and engineering challenges of the age; telling the time at sea. Finding an accurate clock was essential to enable sailors to navigate safely across the oceans, but mechanical clocks based on pendulums or springs were not good at being bounced around on the ocean waves and soon drifted out of sync. In order to pinpoint your position on Earth you need the latitude and longitude. Latitude is easy; in the Northern Hemisphere, the angle of the North Star (Polaris) above the horizon is your latitude. In the Southern Hemisphere, things are more complicated because there is no star directly over the South Pole, but it is still possible with a little astronomical know-how and trigonometry to determine your latitude with sufficient accuracy for safe navigation.

Dave gazed at Melanie like Professor Brian Cox eyeing up a particularly thought-provoking mountain range.

In science there are no universal truths, just views of the world that have yet to be shown to be false. Brian Cox

The entirety of our observable universe is an irrelevant pocket of dust in the wider cosmos, which extends way beyond the visible horizon and is conceivably infinite in extent, and I think society has come to terms with this sort of physical irrelevance. It’s hard to look at the Hubble Ultra Deep Field Image, containing over ten thousand galaxies in a piece of the night sky you’d cover very comfortably with an outstretched thumb, and feel important. Our spiritual demotion, however, is an entirely different matter. By spiritual demotion, I mean the realisation that our very existence has no more significance than our physical location. This is surely the case if life is the inevitable result of the action of the same set of natural laws that formed the stars and planets. Earth must be one of countless billions of living worlds in the Milky Way galaxy alone. This is absolutely not to suggest that our civilisation is not worth celebrating and fighting to preserve – it is my view that civilisations may be extremely rare, even if life is common.

dwarf galaxies, have as few as ten million stars. The biggest, the giants, have been estimated to contain in the region of 100 trillion.

There is a button on most calculators that computes the square root for you. It is usually denoted by the symbol “√” and one would normally write things like 3 = √9. As you can see, the square root is the opposite of squaring, 42 = 16 and √16 = 4.

First we guess it. Then we – now don’t laugh, that’s really true – then we compute the consequences of the guess to see what, if this is right, if this law that we guessed is right, to see what it would imply. And then we compare the computation results to nature, or we say compare to experiment or experience, compare it directly with observations to see if it works. If it disagrees with experiment, it’s wrong.

I don't need answers to everything. I want to have answers to find.

Professor Brian Cox,

Mathematics, rightly viewed, possesses not only truth, but supreme beauty – a beauty cold and austere, like that of sculpture, without appeal to any part of our weaker nature, without the gorgeous trappings of painting or music, yet sublimely pure, and capable of a stern perfection such as only the greatest art can show. The true spirit of delight, the exaltation, the sense of being more than Man, which is the touchstone of the highest excellence, is to be found in mathematics as surely as in poetry.

Theoretical physicists studying inflationary models have discovered that almost all of them are eternal, in the sense that they stop inflating in patches rather than all at once. This means that the potential for creating universes, in the guise of inflation, is always expanding faster than it is decaying away, and it will therefore never stop. We live in an infinite, eternal, fractal multiverse comprised of an infinite number of universes like ours, alongside an infinite number of universes with different physical laws. We exist because it is inevitable. Almost.

I have found it impossible to get a chest of drawers in the back of a Ford Fiesta and a tent back in its bag, so fitting a universe into a melon boggles me and my mind.

There are too many people in this world who want to be right, and too few who just want to know.

THE FIRST DAY OR SO WE ALL POINTED TO OUR COUNTRIES. THE THIRD OR FOURTH DAY WE WERE POINTING TO OUR CONTINENTS. BY THE FIFTH DAY WE WERE AWARE OF ONLY ONE EARTH.’ — SULTAN BIN SALMAN BIN ABDULAZIZ AL-SAUD, SPACE SHUTTLE STS-51-G

Russell’s point is not to assert his right to be left alone to his personal delusions, but that devising a theory that cannot be proved or disproved by observation is pointless in the sense that it teaches you nothing, irrespective of how passionately you may believe in it. You can invent any object or idea you like, but if there is no way of observing it or its consequences, you haven’t made a contribution to the scientific understanding of the universe.

What's interesting if you look at the basic physics of the universe going from the Big Bang to where we are today, is that the physics is driven by the fact that the universe began in an extremely ordered state. See, it was a very highly ordered system. And it is tending towards a more disordered system at the moment. And that's called the second law of thermodynamics. What we strongly suspect, and I would say know, is that in that processes of going from order to disorder, complexity emerges naturally for a brief period of time. So it's a natural path that in the evolution of the universe you get period in time where there's complexity in the universe - stars, and planets, and galaxies, and light, and civilisations. But they exist because the universe is decaying, not in spite of the fact that the universe is decaying. So our existence in that sort of picture is necessarily finite and necessarily time limited. And it is a remarkable thing that that complexity has gone so far, that there are things in the universe that can think, and feel, and explore it. And I think that is the answer. If you want an answer to the meaning of it all, it's that. That you are a part of the universe because of the ways the laws of nature work. You are allowed to exist, but you are allowed to exist for a temporary, small amount of time in a possible infinite universe.