This video is about how causal models (which use causal networks) allow us to infer causation from correlation, proving the common refrain not entirely accurate: statistics CAN be used to prove causality! Including: Reichenbach’s principle, common causes, feedback, entanglement, EPR paradox, and so on.
Joe and Neil discuss a wide variety of topics, including the flat earth conspiracy theory.
Access to the past would open all sorts of new possibilities of more than travel.
By Charles Q. Choi, ISNS Contributor via Inside Science
(ISNS) — Time travel is often a way to change history in science fiction such as “Back to the Future” and “Looper.” Now researchers suggest a certain kind of time machine could also possess another powerful capability — cloning perfect copies of anything.
However, scientists noted the way these findings violate what is currently known about quantum physics might instead mean such time machines are not possible.
We are all time travelers in that we all move forward in time. However, scientists have suggested it might be possible to move back in time by manipulating the fabric of space and time in our cosmos. All mass distorts space-time, causing the experience of gravity, a bit like how a ball sitting on a rubber sheet would make nearby balls on the sheet roll toward it. Physicists have proposed time machines that could bend the fabric of space and time so much that timelines actually turn back on themselves, forming loops technically known as “closed timelike curves.”
These space-time warps can develop because of wormholes — tunnels that can in theory allow travel anywhere in space and time, or even into another universe. Wormholes are allowed by Einstein’s general theory of relativity, although whether they are practically possible is another matter.
A key limitation of this kind of time machine would be that any traveler using it cannot go back to a time before the device was built. It only permits travel from the future back to any point in time after the machine was constructed.
Scientists have for decades explored what closed timelike curves are capable of if they are possible.
One complication they would encounter is the no-cloning theorem in quantum physics, which basically forbids the creation of identical copies of any particle one does not know everything about to begin with.
In classical physics, one can generate a perfect copy of anything by finding out every detail about it and arranging the same components in the same order. However, in the bizarre world of quantum physics — the best description so far of how reality behaves on its most fundamental levels — one cannot perfectly measure every detail of an object at once. This is related to Heisenberg’s uncertainty principle, which notes that one can perfectly measure either the position or the momentum of a particle, but not both with unlimited accuracy.
Nearly 25 years ago, theoretical physicist David Deutsch at the University of Oxford in England suggested closed timelike curves might actually violate the no-cloning theorem, allowing perfect copies to be constructed of anything. Now scientists reveal this might be true in findings detailed in the Nov. 8 issue of the journal Physical Review Letters.
To understand this research, imagine one builds a time machine in the year 2000. One could place a letter into the device in the year 3000 and pick it up within this box in 2000 or any year between then and 3000. From the perspective of the letter, it goes inside this time machine into one mouth of a wormhole in the future and comes out the other mouth of the wormhole in the past.
However, theoretical physicist Mark Wilde at Louisiana State University, in Baton Rouge, and his colleagues found this scenario may be more complex than previously thought. Instead of the time machine containing just one wormhole, it could possess many wormholes, each at some point in time between the future and the moment of its creation. A letter entering the box in 3000 might exit from a wormhole in 2999, instantaneously go back into that wormhole and emerge in 2998, and so on.
“It’s like there are 1,000 different particles emerging from all the wormholes, but in fact they’re all the same particle you sent in the beginning,” Wilde said. “You just have all these temporary copies emerging from and going back into these wormholes.”
Some ideas are so compelling and seductive it seems there will always be those who succumb to their siren song. We easily understand how transformative these technologies will be and can’t help feeling that if we work hard enough, we can achieve them – the panacea, free energy, anti-gravity, and regeneration to name a few.
Free energy and anti-gravity machines attract engineers and tinkerers who cannot help but think that if they can figure out the proper arrangement of moving parts, they can bypass the laws of physics. Over the decades they have produced often complex and sometimes elegant machines that seem like they might work, but always always they miss something subtle.
The pattern by now is very clear, and depressingly repetitive. The inventor spends years developing a machine to exploit some physical property, such as the interaction of magnets, or the seemingly funny physics of rapidly rotating systems. Their scale models seem to do what they are supposed to – usually they spin. At some point the inventor believes they are ready to show their incipient invention to the world, perhaps now they are ready to attract major investors to help build the full scale operating versions of their technology.
What they present to the world are complex diagrams, and scale models that do something, but never what they are claimed to do. We never see a free energy device actually producing energy and running electrical devices without any outside input or burning of fuel. We never see anti-gravity devices levitating.
Of course, if the inventors could actually produce what they claim, they would garner serious attention. Instead they are largely ignored and criticized – their years, even decades, of loving labor dismissed. How can this be? They must simply be too far ahead of their time for the rubes to understand their genius. Plus, there must be some sinister conspiracy working against them – Big Oil or whatever.
It’s sad – another mind, perhaps even brilliant in their way, lost to the allure of the impossible.
There are many phrases that are used to refer to impossible technologies. What seems to happen is that proponents come up with a term for their invention. Their invention is found to be nothing but a fantasy, and the term becomes associated with negative connotations. The next generation of proponents then come up with a new technical term, and the cycle continues.
So perpetual motion machines become free energy machines, then zero-point energy, then over-unity machines, etc.
Last year, January of 2013, an inventor by the name of Rick R. Dobson revealed his “closed loop propulsion” technology – the product of 27 years of development. Closed-loop propulsion is a synonym for inertial propulsion, or massless propulsion. He also calls his technology centrifugal propulsion.
The idea behind such technologies is to produce propulsion without any propellant. Propellant is one of those annoying necessities of physics.
Tests could reveal whether we are part of a giant computer simulation — but the real question is if we want to know…
In the 1999 sci-fi film classic The Matrix, the protagonist, Neo, is stunned to see people defying the laws of physics, running up walls and vanishing suddenly. These superhuman violations of the rules of the universe are possible because, unbeknownst to him, Neo’s consciousness is embedded in the Matrix, a virtual-reality simulation created by sentient machines.
The action really begins when Neo is given a fateful choice: Take the blue pill and return to his oblivious, virtual existence, or take the red pill to learn the truth about the Matrix and find out “how deep the rabbit hole goes.”
Physicists can now offer us the same choice, the ability to test whether we live in our own virtual Matrix, by studying radiation from space. As fanciful as it sounds, some philosophers have long argued that we’re actually more likely to be artificial intelligences trapped in a fake universe than we are organic minds in the “real” one.
But if that were true, the very laws of physics that allow us to devise such reality-checking technology may have little to do with the fundamental rules that govern the meta-universe inhabited by our simulators. To us, these programmers would be gods, able to twist reality on a whim.
So should we say yes to the offer to take the red pill and learn the truth — or are the implications too disturbing?
Worlds in Our Grasp
The first serious attempt to find the truth about our universe came in 2001, when an effort to calculate the resources needed for a universe-size simulation made the prospect seem impossible.
Seth Lloyd, a quantum-mechanical engineer at MIT, estimated the number of “computer operations” our universe has performed since the Big Bang — basically, every event that has ever happened. To repeat them, and generate a perfect facsimile of reality down to the last atom, would take more energy than the universe has.
“The computer would have to be bigger than the universe, and time would tick more slowly in the program than in reality,” says Lloyd. “So why even bother building it?”
But others soon realized that making an imperfect copy of the universe that’s just good enough to fool its inhabitants would take far less computational power. In such a makeshift cosmos, the fine details of the microscopic world and the farthest stars might only be filled in by the programmers on the rare occasions that people study them with scientific equipment. As soon as no one was looking, they’d simply vanish.
In theory, we’d never detect these disappearing features, however, because each time the simulators noticed we were observing them again, they’d sketch them back in.
That realization makes creating virtual universes eerily possible, even for us.
- Do We Live in the Matrix? (discovermagazine.com)
- Is there an afterlife? Scientists offer Matrix-style theory of reality to answer life’s biggest question (mirror.co.uk)
. .. never mind that there is no evidence for these gaussy guys and gals, what would the world be like if people really did generate a noticeable or even intense magnetic field?
Strip club patrons would get quite a show, more so than usual, if people really were magnetic.
Amid the dollar bills and drunk-at-noon businessmen, a magnetic stripper, if she spun fast enough around the poll, would melt it. At the very least she would shock herself before shocking the crowd. When a conductor like metal meets a changing magnetic field, the magic of reality induces an electric current in it. Flip-flop this current around enough, and the metal heats up to the point of melting.
If people really were magnetic, they would be terrible navigators. Taking to their smart phones and computers, their screens would blur out and become unusable. Going back to the old methods, a compass wouldn’t help much either. It would be more likely to find you than Earth’s magnetic north.
Like all interesting human qualities, magnetic people would have a range of field strengths. Perhaps there would even be schools and universities dedicated to harnessing or improving your output. In any case, the strength of the field matters quite a bit. It’s the difference between being a glorified refrigerator magnet and being able to free fall down a metal tube without dying.
Magnetic people with the strength of refrigerator magnets would produce a field 100 times stronger than the Earth’s. But if any fortunate “Magnetos” existed, perhaps with MRI-like output, they would have one million times the field strength of Earth. For the refrigerator-strength people, you wouldn’t have to change much. But a public warning would have to go out whenever those Magnetos were about. Entire houses, entire cities, would have to be shielded; all metal objects not tied down turn into deadly projectiles. In fact, a rogue oxygen tank once proved this danger, killing a patient during an MRI scan after rocketing across the room, drawn by the monstrous amount of teslas. (You can see the incident re-created here.) And at this strength, you better avoid your friend’s stack of old floppy disks and unshielded hard drives, as you could shuffle their bits into blurry oblivion.
But it wouldn’t be all bad. Magnetic craftsmen would find that every part of their body has become a convenient tool and nail holder. Salmon fishermen could experience a huge boom. As salmon navigate their way home according to the Earth’s magnetic fields, a giant magnet in the form of a fisherman could disorient or even attract the fish. Magnetic lifeguards could take to the ocean as shark repellants.
Lovers might find it annoying however, as there is no telling when your poles, so to speak, would line up.
If people really were magnetic, it would eliminate the need for elevators, at least as a way down. A strong enough magnet can . . .
- Sun’s Magnetic Field Poised to Reverse Its Polarity (spacedaily.com)
- SUNS’S MAGNETIC FIELD TO REVERSE: What It Means (michaelaprile.wordpress.com)
- The World’s Most Powerful MRI Takes Shape (spectrum.ieee.org)
- Sun’s Magnetic Field Will Flip Soon (fromthetrenchesworldreport.com)
Every now and then i just geek out on science 🙂
From the “Almost Too Stupid to Post” file . . .
This post is for all those doomsayers building backyard bunkers in preparation for the day the world comes to an end because of the north and south poles shifting.
Yes, some people fear the day the north and south poles shift their positions or even reverse positions. They believe such a shift in the Earth’s magnetic field will result in earthquakes, tsunamis, global climatic change and eventually the destruction of our planet.
(As a side note: Are there ANY conspiracy theories out there that DON’T end with everybody being annihilated or the planet being destroyed? Just asking. I’m beginning to suspect there is a conspiracy to NOT have any conspiracies with a happy ending. But i digress . . . :))
The following article explains the regularity of pole shifting. Apparently, the poles have only been shifting every hour of everyday for a gazillion years. The north and south poles have even swapped positions 400 times in the last 330,000,000 years.
So open your bunker doors dear doomsdayers, it’s safe to crawl out – – – and don’t forget your compasses.
The Earth has several poles, not just two. It has geographic north and south poles, which are the points that mark the Earth’s axis of rotation. It also has magnetic north and south poles, based on the planet’s magnetic field. When you use a compass, it points to the magnetic north pole, not the geographic North Pole.
The Earth’s magnetic poles move. The magnetic North Pole moves in loops of up to 50 miles (80 km) per day. But its actual location, an average of all these loops, is also moving at around 25 miles a year [ref]. In the last 150 years, the pole has wandered a total of about 685 miles (1102 kilometers). The magnetic South Pole moves in a similar fashion.
The poles can also switch places. Scientists can study when this has happened by examining rocks on the ocean floor that retain traces of the field, similar to a recording on a magnetic tape. The last time the poles switched was 780,000 years ago, and it’s happened about 400 times in 330 million years. Each reversal takes a thousand years or so to complete, and it takes longer for the shift to take effect at the equator than at the poles. The field has weakened about 10% in the last 150 years. Some scientists think this is a sign of a flip in progress.
The Earth’s physical structure is behind all this magnetic shifting. The planet’s inner core is made of solid iron. Surrounding the inner core is a molten outer core. The next layer out, the mantle, is solid but malleable, like plastic. Finally, the layer we see every day is called the crust.
The Earth itself spins on its axis. The inner core spins as well, and it spins at a different rate than the outer core. This creates a dynamo effect, or convections and currents within the core. This is what creates the Earth’s magnetic field — it’s like a giant electromagnet.
- longitude and latitudes locations of the north magnetic field (educationbulletinboard.com)
- Sun’s Magnetic Field Will Soon Reverse – Be Prepared for the Flip (greenprophet.com)
Did the US Navy make an entire ship disappear in a 1943 experiment that went awry?
- Time Travel and the Mystery of the Philadelphia Experiment (starshake.wordpress.com)
- Mysteries: Top 5 Wildest Conspiracy Theories (theepochtimes.com)
I have been a fan of Dr. Susan Blackmore ever since i read her book In Search of the Light: The Adventures of a Parapsychologist.
One of my favorite topics she writes and talks about is her theory that we don’t have free will. I am fascinated by such a counterintuitive idea. Maybe you will be too.
This video is about an hour long, i haven’t finished watching it yet, but i’m sure i will enjoy it if it’s like all her other discussions.
Watch the video below to see the strangest cloud phenomenon you will ever see! Guaranteed.
Then click the link below the video for the explanation from the good people over at Ghost Theory. Cool stuff.
- Ghost Picture of the Day: Light Anomaly (ghostsnghouls.com)
- The Friendly “Ghost” (rethinkingtheology.com)
- Ghost investigation at Fort Desoto (tampataxihack.com)
- Ghost hunters check Tasmania’s Franklin House for bumps in the night (abc.net.au)
- Ghostly Pics: Hampton Court Ghost (newsfromthespiritworld.com)