Physics on the Fringe: Dr. Kaku Answers Questions from Science Channel Viewers
The Science Channel will re-run all five seasons of the sci-fi cult drama Fringe beginning tonight at 8pm. The two-hour pilot will air along with the first episode, followed by daylong marathons on Nov. 23 and Nov. 24.
The relaunch will also feature "wraparound" introductions and bonus content from Big Think blogger Dr. Michio Kaku. In the Q & A below, Dr. Kaku answers some questions from Science Channel viewers, which ranged from the possibility of an alternate universe or multiverse to time travel, shape shifting, dream sharing and "Cortexiphan experiments."
Here are Dr. Kaku's answers.
If an alternate universe exists, what would that world's Dr. Michio Kaku be known for?
Many quantum physicists today, including several of my friends and colleagues who have won Nobel Prizes, lean toward the Many Worlds interpretation, which states that the quantum universe is continually splitting into parallel universes. String theory (my specialty) also leads naturally to this "multiverse" interpretation, since each solution of string theory represents a different quantum universe.
This means that, in principle, there may be quantum copies of ourselves in these different universes, in which we may be rock stars,famous politicians, or homeless people. Each of these parallel versions of ourselves, in turn, insists that they are the real person, and that all other copies are fake.
But this does not mean that we can easily enter such parallel universes to meet copies of ourselves to settle the question. Think of listening to the radio in your living room. There are many different radio waves filling up your room from different radio stations, but your radio only vibrates (i.e. is coherent) with one station. Your radio has decohered from these other universes and hence cannot pick up their signals. Similarly, each universe vibrates at different quantum frequencies, but we have decohered from them, i.e. we do not vibrate at the same frequency anymore. Hence, it is amazing that there are many parallel universes existing in your living room(e.g. with dinosaurs, pirates, comets, or nothing at all), but you have decohered from them, and hence cannot make contact them.
In principle, perhaps peope who have died are still alive in one of these universes in your living room, but if you reach out,you cannot make contact with them. Yes, this means that Elvis is probably still alive in one of these universes.
Many topics are explored in Fringe, including time travel, shape shifting and dream sharing. Which of these three topics are the most theoretically possible?
All of these technologies are very difficult. but I would guess that dream sharing will come first. Already at the Univ. of Calif. at Berkeley, scientists have placed subjects in an MRI machine, used a computer to decode all the signals emanating from the brain,and then reassembled a reasonable picture of what the person is thinking. When viewing animals, people, buildings, this MRImachine is able to reconstruct a crude picture of these objects. In Kyoto, scientists there have been able to "read" the brain of people who are looking at different words. One possible next step is to place a sleeping person in the MRI machine, and then decodethe signals from the dreaming brain, and then put the image onto a screen. (This has already been done, but so far the images are very crude, but one can clearly tell that a person is dreaming about another person using this MRI machine). So, in the coming years, we might be able to watch our dreams on a DVD as soon as we wake up and share them. Also, deliberately altering the course of a dream, as it progresses, might be possible. "Lucid dreaming," where people are aware of the fact that they are dreaming and hence can alter the course of dreaming, has been verified at the Max Planck Inst. in Germany. Hence, it might be possible to watch a screen and deliberately alter the course of the dream by talking to the dreamer.
Shape shifting might be possible within, say, a century. Already, scientists can create computer chips the size of grains of sand. These chips can be programmed to alter the electrical charge on the surface, so they bind in definite patterns. This is called programmable matter, where we tell these smart sand particles to reassemble into different shapes. Just like we program software,we might be able to program intelligent sand so that it can reassemble into different shapes.Eventually, these smart grains of sand might become the size of molecules, in which case we might be able to alter the shape of an object at will. Some scientists believe that the key to this might be a nanobot which can guide molecules to rearrange themselves into any object you want, like the replicator in Star Trek. Although physically possible, the techinical problems may take a century to solve.
Time travel is also theoretically possible, but extremely difficult to achieve in the lab. If you have enough positive energy (e.g. a black hole) to punch a hole in space, and enough negative energy to keep the hole open against gravity, then you might be able to build a time machine. Since the energy necessary to tear a hole in space is comparable to that of a star, this technology is many thousands of years into the future, if it is possible at all. So far, no one has ever been able to find an error in the equations which allow for time travel. (One objection might be that radiation builds up as you enter the time machine, since energy can circulate an infinite number of timesthrough the time machine). Then it might explode as soon as you enter. But this problem may be eliminated in the ManyWorlds interpretation, where energy makes just a single pass through the machine.) To settle the question, we need a "theory of everything," like string theory, to calculate the radiation that might be created by the time machine.
Cortexiphan experiments were done on Agent Dunham when she was a child by Walter Bishop and William Bell. The result left Olivia and the other children in the trials with heightened mental abilities. While Cortexiphan is not real, is it safe to say heightened mental abilities can result from medical experimentation?
There are several ways in which one might, in principle, enhance our brain power. First, by using genetics. Already, scientists at Princeton have discovered the "smart mouse" gene, from which you can create a mouse with superiorcognitive skills. These mice can navigate mazes much faster, they learn tasks much faster, they have better memory, etc. The chemical pathways which make all this possible is also being decoded. Humans have a counter part of this gene in our body, so it might be possible one day to enchance our abilities in this fashion. Also, we are 98.5% genetically equivalent to a chimp, our closest evolutionary neighbor. But we live twice as long and are much more intelligent. Hence, among a handful of genes separating us from the chips are the genes which doubled our life span and alsoincreased our intelligence, and we are finding these genes now.
Also, scientists have studied individuals with "savant syndrome," in which they suffer from mental disorders, but have fantastic calculational and artistic abilties far beyond normal. Usually, there is some degeneration, damage, or lesion on a specific part of their left temporal lobe of their brain. It is believed, although not proven, then this disrupts the balance between the left and right brain, so that the right brain compensates for the impairment of the left temporal lobe, causing these abilities to surface (while normally they are suppressed). Some scientists have even tried to use magnetic cranial devices to "shut down" this area of the left temporal lobe to induce this ability. (The results of this experiment were mixed, with some enhancement taking place, but nothing like what has been found in these individuals). It may be possible, however, that one day science can duplicate this miraculous ability.
So far, there is no proven way of increasing our brain power. But all of this suggests that it might soon be well within the laws of science to enhance our intelligence.
Jonathan Zimmerman explains why teachers should invite, not censor, tough classroom debates.
- During times of war or national crisis in the U.S., school boards and officials are much more wary about allowing teachers and kids to say what they think.
- If our teachers avoid controversial questions in the classroom, kids won't get the experience they need to know how to engage with difficult questions and with criticism.
- Jonathan Zimmerman argues that controversial issues should be taught in schools as they naturally arise. Otherwise kids will learn from TV news what politics looks like – which is more often a rant than a healthy debate.
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- This map lists their names and locations, and their CEOs.
- The climate crisis may be too complex for these 100 people to solve, but naming and shaming them is a good start.
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- SpaceX launched Falcon Heavy into space early Tuesday morning.
- A part of its nosecone – known as a fairing – descended back to Earth using special parachutes.
- A net-outfitted boat in the Atlantic Ocean successfully caught the reusable fairing, likely saving the company millions of dollars.
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