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wildcat2030:

What Is the Universe? Real Physics Has Some Mind-Bending Answers
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Science says the universe could be a hologram, a computer program, a black hole or a bubble—and there are ways to check
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The questions are as big as the universe and (almost) as old as time: Where did I come from, and why am I here? That may sound like a query for a philosopher, but if you crave a more scientific response, try asking a cosmologist. This branch of physics is hard at work trying to decode the nature of reality by matching mathematical theories with a bevy of evidence. Today most cosmologists think that the universe was created during the big bang about 13.8 billion years ago, and it is expanding at an ever-increasing rate. The cosmos is woven into a fabric we call space-time, which is embroidered with a cosmic web of brilliant galaxies and invisible dark matter. It sounds a little strange, but piles of pictures, experimental data and models compiled over decades can back up this description. And as new information gets added to the picture, cosmologists are considering even wilder ways to describe the universe—including some outlandish proposals that are nevertheless rooted in solid science:

The universe is a hologram

Look at a standard hologram, printed on a 2D surface, and you’ll see a 3D projection of the image. Decrease the size of the individual dots that make up the image, and the hologram gets sharper. In the 1990s, physicists realized that something like this could be happening with our universe.

Classical physics describes the fabric of space-time as a four-dimensional structure, with three dimensions of space and one of time. Einstein’s theory of general relativity says that, at its most basic level, this fabric should be smooth and continuous. But that was before quantum mechanics leapt onto the scene. While relativity is great at describing the universe on visible scales, quantum physics tells us all about the way things work on the level of atoms and subatomic particles. According to quantum theories, if you examine the fabric of space-time close enough, it should be made of teeny-tiny grains of information, each a hundred billion billion times smaller than a proton.

Stanford physicist Leonard Susskind and Nobel prize winner Gerard ‘t Hooft have each presented calculations showing what happens when you try to combine quantum and relativistic descriptions of space-time. They found that, mathematically speaking, the fabric should be a 2D surface, and the grains should act like the dots in a vast cosmic image, defining the “resolution” of our 3D universe. Quantum mechanics also tells us that these grains should experience random jitters that might occasionally blur the projection and thus be detectable. Last month, physicists at the U.S. Department of Energy’s Fermi National Accelerator Laboratory started collecting data with a highly sensitive arrangement of lasers and mirrors called the Holometer. This instrument is finely tuned to pick up miniscule motion in space-time and reveal whether it is in fact grainy at the smallest scale. The experiment should gather data for at least a year, so we may know soon enough if we’re living in a hologram.

The universe is a computer simulation

Just like the plot of the Matrix, you may be living in a highly advanced computer program and not even know it. Some version of this thinking has been debated since long before Keanu uttered his first “whoa”. Plato wondered if the world as we perceive it is an illusion, and modern mathematicians grapple with the reason math is universal—why is it that no matter when or where you look, 2 + 2 must always equal 4? Maybe because that is a fundamental part of the way the universe was coded.

In 2012, physicists at the University of Washington in Seattle said that if we do live in a digital simulation, there might be a way to find out. Standard computer models are based on a 3D grid, and sometimes the grid itself generates specific anomalies in the data. If the universe is a vast grid, the motions and distributions of high-energy particles called cosmic rays may reveal similar anomalies—a glitch in the Matrix—and give us a peek at the grid’s structure. A 2013 paper by MIT engineer Seth Lloyd builds the case for an intriguing spin on the concept: If space-time is made of quantum bits, the universe must be one giant quantum computer. Of course, both notions raise a troubling quandary: If the universe is a computer program, who or what wrote the code?

(via What Is the Universe? Real Physics Has Some Mind-Bending Answers | Science | Smithsonian)

shreksforthememories:

food should be free. water should be free. housing should be free. power, fuel, electricity should be free. basic necessities should be free.

the idea of “people should have to work for a living” carries the implication that some people deserve to die

99percentinvisible:

Selections from “Killer Heels,” a new exhibit at the Brooklyn Museum.

pewresearch:

Which traits are MOST important to teach your kids? Responsibility tops the list for both liberals and conservatives, but opinions diverge from there.

pewresearch:

Which traits are MOST important to teach your kids? Responsibility tops the list for both liberals and conservatives, but opinions diverge from there.

The best revenge is massive success.
Frank Sinatra (via glamour)
alexinsd:

Urbanism works when it creates a journey as desirable as the destination.
-Paul Goldberger

alexinsd:

Urbanism works when it creates a journey as desirable as the destination.

-Paul Goldberger

jeremykaye:

I choose you, Gunkachu!
Facebook - Twitter - UP and OUT subreddit - Patreon

jeremykaye:

I choose you, Gunkachu!

Facebook - Twitter - UP and OUT subreddit - Patreon

The towers are gone now, reduced to bloody rubble, along with all hopes for Peace in Our Time, in the United States or any other country. Make no mistake about it: We are At War now — with somebody — and we will stay At War with that mysterious Enemy for the rest of our lives.

It will be a Religious War, a sort of Christian Jihad, fueled by religious hatred and led by merciless fanatics on both sides. It will be guerilla warfare on a global scale, with no front lines and no identifiable enemy.

mostlysignssomeportents:

The term cobra effect stems from an anecdote set at the time of British rule of colonial India. The British government was concerned about the number of venomous cobra snakes in Delhi.[3] The government therefore offered a bounty for every dead cobra. Initially this was a successful strategy as large numbers of snakes were killed for the reward. Eventually, however, enterprising persons began to breed cobras for the income. When the government became aware of this, the reward program was scrapped, causing the cobra breeders to set the now-worthless snakes free. As a result, the wild cobra population further increased. The apparent solution for the problem made the situation even worse.

anakistarsong:

zing-noir:

River otters at the Zoological & Botanical Garden in Ichikawa, Japan

omg the last one he pops up ahjfskghfagskjfkhdjs ahahaha

This is what heaven looks like…