Information about each path can be imagined as a vector, called phase. Different phases can enhance or diminish each other. Adding up all the phases enables us to calculate the probability of the particle reaching point B.

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29

The Grand Design

The laws of nature seem mysteriously crafted to allow for complex life. Scientific explanations involve the existence of multiple universes with different sets of laws. Thus, a universe with our set of laws is no more special than the unique configuration of our solar system or the very planet we live on.

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Any model which agrees with observation is of equal value to any likewise model. No such model can be said to be more real than any other such model. Models are evaluated in terms of simplicity and their ability to make clear, falsifyable preditions.

Simon Steiger

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The heliocentric model of Johannes Kepler can not be said to be more 'real' than the much older geocentric model of Ptolemy. Both agree with observation, although the heliocentric model is much more elegant in its explanation.

Simon Steiger

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Our being restricts the environments we could potentially find ourselves in. We could not exist in a solar system with two suns, and thus find ourselves in a system with a single sun. This type of deduction is called 'weak anthropic principle'.

Simon Steiger

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The habitable zone of a star ('Goldilocks Zone') is determined by the size and temperature of the star. A planet too close will be too hot for life; those beyond the zone too cold.

Simon Steiger

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Physicist John Wheeler considered replicating the double-slit experiment with photons from a distant quasar. Whether we observe or not (thus altering the resulting inference pattern) will impact light that emerged even before our sun came to exist.

Simon Steiger

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Ever thought about the dimensions of the big bang? No? Try to imagine a coin of one centimeter diameter suddenly blowing up to ten million times the width of the Milky Way.

Simon Steiger

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Feynman assumes that particles at microscopic scale travel from A to B by taking every possible path - simultaneously. This accounts for the inference patterns observed in the double slit experiment.

Simon Steiger

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According to Feynman, a particle samples every path connecting point A and B, hence collecting information about the path to be taken. Manipulation of the experiment, e.g. closing one of the slits, will change information collected and the result observed.

Simon Steiger

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Humanity's role in the universe is in no way central or privileged. Despite this, only a very narrow range of possible universes could support organisms as complex as humans. We had a great influence on creation - indirectly.

Simon Steiger

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In 1929, Edwin Hubble deducted that the universe must be expanding. Recession speed increases with distance. The extrapolation of this idea into the distant past lead to the big bang hypothesis.

Simon Steiger

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To better visualize the expansion and increasing speed of recession, imagine all galaxies on the surface of an inflating baloon. After a certain time, a galaxy near the observer will have moved less than an already very distant galaxy.

Simon Steiger

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Universes appear randomly due to quantum fluctuations. Most collapse after a fraction of time, a few inflate to critical size. All universes start off in a very similar way, each with all possible histories ahead of them. In later stages, different universes differ immensely.

Simon Steiger

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Adding up all energies within the universe, the resulting number must be zero. Bodies not requiring any energy to assemble can appear entirely at random.

Simon Steiger

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Inside a sufficiently inflated universe, space is locally stable. This dictates that any isolated body surrounded by empty space must have a positive energy total. In other words: To assemble this body, work has to be done.

Simon Steiger

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In the very early universe, there were four dimensions of space and none of time. Time is a modified space dimension. To ask what came before the beginning of the universe is as meaningless as asking what is south of the South Pole.

Simon Steiger

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General theory of relativity illustrates that time and space are not independant. Once quantum effects are taken into account, time can be warped to an extent that it behaves identical to another space dimension. This requires an extreme scenario, e.g. the big bang.

Simon Steiger

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Moving clocks run more slowly than unmoved clocks ('Time dilation'). This also applies to biological clocks, making moving people age more slowly. However, this effect is only noticeable at extremely high velocities, such as 50% of light speed.

Simon Steiger

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The strong anthropic principle suggests that our existence imposes not only constraints on the environment we live in, but also on the utmost fundamental form and content of the laws of nature themselves.

Simon Steiger

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Not only planet Earth, but also the configuration of our solar system and the design of the fundamental laws of nature of our universe seem oddly conductive to human life. The tiniest variation in any law of nature would lead to an entirely inanimate universe.

Simon Steiger

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1. GravityThe weakest of the four forces. Its long range implies that all objects in the universe attract each other. For large bodies, gravitational forces can dominate over all other forces because they are additive.

Simon Steiger

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2. ElectromagnetismThis force is much stronger than gravity while also operating at long range. It requires affected particles to be electrically charged. Biology and chemistry are the result of electromagnetic interactions.

Simon Steiger

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3. Weak nuclear forceThis force causes radioactivity. It played a central role in the formation of elements in stars during the early stages of the universe. There is no contact with this force in everyday life.

Simon Steiger

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4. Strong nuclear forceThis force binds the components of atomic nuclei together. The strong nuclear force is the energy source for stars and nuclear power facilities. As with the weak force, we experience no direct contact with it.

Simon Steiger

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M-Theory is a network of domain specific theories to explain every aspect of the universe. Whenever there is overlap, overlapping theories have to agree on observations made. Hence, M-Theory can be treated as a single theory.

Simon Steiger

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Now, [...] faced with scientific claims like [...] the multiverse hypothesis [...], the Catholic Church will again defend human nature by proclaiming that the immanent design in nature is real.

Christoph Schönborn, archbishop of Vienna

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The most incomprehensible thing about the universe is that it is comprehensible.

Albert Einstein, theoretical physicist

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Also known as the Buckyball experiment, Austrian researchers shot molecules through a barrier with two slits. Results did not agree with Newtonian physics but instead showed an inference pattern resembling expected results for light waves.

Simon Steiger

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On an atomic scale, all particles exhibit features known from the wave/particle duality of light. Everyday Newtonian physics can not explain observations on a microscopic scale but approximate results on macroscopic scales.

Simon Steiger

One must marry one's feelings to one's beliefs and ideas. That is probably the only way to achieve a measure of harmony in one's life.

Napoleon Hill

Most things in music go full circle eventually.

Simon Cowell

Sohu will protect you from yourself.

Rebecca MacKinnon

When it became clear that I wasn't going to have the opportunity to do any work on VR while at id software, I decided to not renew my contract.

John Carmack

There are no sure answers, only better questions.

Dick Van Dyke

What a man does defiles him, not what is done by others.

William Golding

Playing the guitar, you kind of lock into a rhythm and a groove, and then it relaxes me to make up lyrics and sing.

Cat Power

I feel that I, and the people under my command, tried to use all the traditional methods of recruiting agents which were also used by other intelligence services; adopting also means like pressure, money, sex - but that did not characterize my service.

Markus Wolf

One man's opportunism is another man's statesmanship.

Milton Friedman

Confidence is a pencil best sharpened with paper.

Kale Burton

I was a rebel. I went to Carmel Convent in Delhi where I was a complete rebel. I thought I was 12 going on 18. I wanted to go out with friends older to me, stay out late - my parents were horrified. It was then that we began having our first disagreements.

Lillete Dubey

I think the amazing thing about 'Twin Peaks' was that it completely changed television from that point forward.

Madchen Amick

I work for me, 18 hours a day. It's my gig. So I don't have time to get a point of view.

David Cassidy

The main thing is the ability to control your instrument, which, in the actor, is yourself. Look the way you want the character to look. Sound the way you want the character to sound. Once you've trained the instrument to do what you want, you're in control, and you're free.

Geraldine Page

We're not on a desperate mission to write chart compatible stuff.

Stephen Malkmus

I know how it feels to be a woman because I am a woman. And I won't be classified as just a man.

Pete Townshend

I'm quite introverted but I'm not shy.

Marian Keyes

I'm very grateful I went to school to study law, particularly tax law, which really is interesting to me and very useful to me now with my position. Music, however, will always be my number one passion; I like how it connects everyone.

Armin van Buuren

My older sister Nikki went to Hampton music school in Virginia, then to another school later in New York.

Debra Wilson

When you shoot an independent movie you have a very limited amount of time, and you don't want to be that actor, when a poor director is trying to get through a movie, that you're asking at every second to discuss performance.

Isla Fisher