Seeing in the Dark. Credit: cliff1066tm.
Patient TN was, by his own account, completely blind. Two consecutive strokes had destroyed the visual cortex of his brain, and consequently, his ability to see. It is not uncommon for stroke patients to suffer brain damage, but the case of TN — referenced by his initials, the general practice in such studies — was peculiar. His first stroke had injured only one hemisphere of his visual cortex.
About five weeks later, a second stroke damaged the other hemisphere. Known as selective bilateral occipital damage, TN’s unusual injury made him the subject of much interest while recovering at a hospital in Geneva. To further test the extent of TN’s abilities, researchers from Tilburg University in the Netherlands devised a simple yet decisive experiment: an obstacle course. TN’s rare condition is known as blindsight.
The researchers explained that TN’s success indicates that “humans can sustain sophisticated visuo-spacial skills in the absence of perceptual awareness.” Neuron-galaxy.jpg (Image JPEG, 1008x633 pixels) - Redimensionnée (99%) 100 Very Cool Facts About The Human Body. The Brain The human brain is the most complex and least understood part of the human anatomy.
There may be a lot we don’t know, but here are a few interesting facts that we’ve got covered. Nerve impulses to and from the brain travel as fast as 170 miles per hour. Ever wonder how you can react so fast to things around you or why that stubbed toe hurts right away? It’s due to the super-speedy movement of nerve impulses from your brain to the rest of your body and vice versa, bringing reactions at the speed of a high powered luxury sports car.The brain operates on the same amount of power as 10-watt light bulb. Hair and Nails While they’re not a living part of your body, most people spend a good amount of time caring for their hair and nails. Facial hair grows faster than any other hair on the body.
Internal Organs Though we may not give them much thought unless they’re bothering us, our internal organs are what allow us to go on eating, breathing and walking around. Bodily Functions Senses. Possibilianism. Not to be confused with Possibilism.
Possibilianism is a philosophy which rejects both the diverse claims of traditional theism and the positions of certainty in strong atheism in favor of a middle, exploratory ground.[1][2][3][4][5] The term was first defined by neuroscientist David Eagleman in relation to his book of fiction Sum: Forty Tales from the Afterlives.[6] Asked whether he was an atheist or a religious person on a National Public Radio interview in February 2009, he replied "I call myself a Possibilian: I'm open to...ideas that we don't have any way of testing right now. "[6] In a subsequent interview with the New York Times, Eagleman expanded on the definition: "Our ignorance of the cosmos is too vast to commit to atheism, and yet we know too much to commit to a particular religion.
A third position, agnosticism, is often an uninteresting stance in which a person simply questions whether his traditional religious story (say, a man with a beard on a cloud) is true or not true. 11 cheap gifts guaranteed to impress science geeks. Science comes up with a lot of awesome stuff, and you don't need a Ph.D, a secret lab, or government funding to get your hands on some of the coolest discoveries.
We've got a list of 11 mostly affordable gifts that are guaranteed to blow your mind, whether or not you're a science geek. Click on any image to see it enlarged. 1. Aerogel Also known as frozen smoke, Aerogel is the world's lowest density solid, clocking in at 96% air. Aerogel isn't just neat, it's useful. Price: $35 2. Inside these sealed glass balls live shrimp, algae, and bacteria, all swimming around in filtered seawater. EcoSpheres came out of research looking at ways to develop self-contained ecosystems for long duration space travel. Price: $80 3. NASA has been trying to figure out how to get a sample of rock back from Mars for a while now. Every once in a while, a meteorite smashes into Mars hard enough to eject some rocks out into orbit around the sun.
Price: $70+ 4. Price: $150 5. The McGurk Effect.