Why Do We See in 3-D? | Life's Little Mysteries. When it comes to seeing in 3-D, two eyes are better than one. To see how 3-D vision works, hold a finger at arm's length and look at it through one eye, then through the other. See how the image seems to jump? That's because of binocular disparity, the slight difference between the images seen by each eye. Binocular disparity is one of the most important pieces of information the visual centers of the brain use to reconstruct the depth of a scene. If the object you're trying to view is close to you, the brain uses another clue: convergence, or the angle of your eyes as you focus on an object. Crossing your eyes will give you an extreme example of the convergence sensation. But even without binocular vision, it's possible to judge depth. Other means of perceiving depth using just one eye involve cues including object size, parallel lines that appear to converge, sharper textures in closer objects, and the way objects overlap.
Why Do We See in Color? Why Is 98.6 F Our 'Normal' Body Temperature? | Fighting Fungal Infections, Body Temperature & Fungus | Life's Little Mysteries. For most folks, a thermometer reading around 98.6 degrees Fahrenheit (37 degrees Celsius) means their body temperature is normal. Now, two scientists have an idea why our bodies, as well as those of most other mammals, consistently run at that temperature : A toasty body temperature helps keep nasty fungal infections at bay.
"One of the mysteries about humans and other advanced mammals has been why they are so hot compared with other animals," said study co-author Arturo Casadevall, professor and chair of microbiology and immunology at Albert Einstein College of Medicine of Yeshiva. "This study helps to explain why mammalian temperatures are all around 98.6 degrees Fahrenheit. " Casdevall's previous work showed that the number of fungal species that can thrive and, therefore, infect an animal declines by 6 percent for every 1.8 degree F (1 C) rise in temperature.
One downside of a higher body temperature is of the amount of food it takes to keep the fire burning. Got a question? Bad Habits: Why We Can't Stop. It might seem a total wonder that a smoker won't quit after hearing that puffing away is a leading cause of death, or that an obese person can't shed a few pounds after learning that lethal ailments loom for the overweight.
But scientists have come up with a host of reasons why humans stick to bad habits, and they are zeroing in on what to do about it. Among the reasons: Innate human defiance. Need for social acceptance. Inability to truly understand the nature of risk. You'd think people were on a one-track mission to self-destruct rather than desiring immortality. "We have found that people aren't changing their behaviors," said Cindy Jardine of the University of Alberta. Killer knowledge In a recent study, a group led by Jardine surveyed 1,200 people in Alberta, Canada in 1994 and again in 2005 about what they perceived to be risky behaviors. In a related study that wrapped up this year, the scientists asked groups of indigenous Canadians why they ranked behaviors dangerous or not. Portland Tribune and Community Newspapers - Ultimate mind reader (almost) By: TRIBUNE PHOTO: CHRISTOPHER ONSTOTT - Aimee Mooney, speech and language pathologist with OHSU's assistive technology program, applies gel (top) to conduct brain signals past the scalp to electrodes in a cap.
The cap has 16 electrodes picking up P300 signals. Talk about pressure. Sixteen electrodes on a cap attached to my skull are reading my mind, and I’m worried about what they are going to say. Within the next few weeks, President Obama is expected to officially announce the next big public/private science initiative. Next up is a push to map the human brain. Thousands of people suffer from what is called “locked-in syndrome.” Their brains still think thoughts, choose one word over another, form sentences. This is still experimental science. Even the way letters are displayed on the laptop screen poses a detail problem. I’d like all the letters of the alphabet up there so I can take my time and focus on the one I want. I choose a two-pronged strategy. The results are exciting. Secret Worlds: The Universe Within - Interactive Java Tutorial. Secret Worlds: The Universe Within View the Milky Way at 10 million light years from the Earth.
Then move through space towards the Earth in successive orders of magnitude until you reach a tall oak tree just outside the buildings of the National High Magnetic Field Laboratory in Tallahassee, Florida. After that, begin to move from the actual size of a leaf into a microscopic world that reveals leaf cell walls, the cell nucleus, chromatin, DNA and finally, into the subatomic universe of electrons and protons.
Once the tutorial has completely downloaded, a set of the arrows will appear that allow the user to increase or decrease the view magnitude in Manual mode. Notice how each picture is actually an image of something that is 10 times bigger or smaller than the one preceding or following it. Earth = 12.76 x 10+6 = 12,760,000 meters wide (12.76 million meters) Plant Cell = 12.76 x 10-6 = 0.00001276 meters wide (12.76 millionths of a meter) Contributing Authors David A. Dreams of Autarky. By Robin Hanson Sept 2001, First version Sept 1999 Genie nanotech, space colonies, Turing-test A.I., a local singularity, crypto credentials, and private law are all dreams of a future where some parts of the world economy and society have an unusually low level of dependence on the rest of the world.
But it is the worldwide division of labor that has made us humans rich, and I suspect we won't let it go for a long time to come. Introduction Many of us expect humanity to encounter enormous changes in the next century, changes that we would do well to consider seriously now. But the fact is that many, and probably most, people who are ``smart" and ``knowledgeable" by standard objective measures disagree with this assessment. When the question is presented to them, such smart knowledgeable people either estimate relatively modest change, or question whether we can now foresee anything useful about whatever large changes may be in store.
How can we come to terms with this disagreement? The Fastest Way To Have Lucid Dreams & OBEs Tonight - Tim... - a Σχολειο video. Psychokinesis. Artist conception of alleged spontaneous psychokinesis from 1911 French magazine La Vie Mysterieuse. PK experiments have historically been criticized for lack of proper controls and repeatability. Furthermore, some experiments have created illusions of PK where none exists, and these illusions depend to an extent on the subject's prior belief in PK. Etymology The word psychokinesis, a portmanteau of the Greek language words ψυχή ("psyche"), meaning mind, soul, spirit, or breath; and κίνησις ("kinesis"), meaning motion, movement, was coined in 1914 by American author Henry Holt in his book On the Cosmic Relations. The term was later adopted by American parapsychologist J.
B. Rhine in 1934 in connection with experiments that were conducted to determine if a person could influence the outcome of falling dice. Belief Notable claimants of psychokinetic ability There have been claimants of psychokinetic ability throughout history.