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Coolest origami figures
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These origami figures were made by a former NASA physicist who combines maths and computing to develop incredible folded paper sculptures.
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2691 |
duddy |
9 years ago |
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2581 |
savio |
10 years ago |
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2486 |
duddy |
10 years ago |
Indeed, our paradox
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We have taller buildings but shorter tempers; wider freeways but narrower viewpoints; we spend more but have less; we buy more but enjoy it less; we have bigger houses and smaller families; more conveniences, yet less time; we have more degrees but less sense; more knowledge but less judgement; more experts, yet more problems; we have more gadgets but less satisfaction; more medicine, yet less wellness; we take more vitamins but see fewer results. We drink too much; smoke too much; spend too recklessly; laugh too little; drive too fast; get too angry quickly; stay up too late; get up too tired; read too seldom; watch TV too much and pray too seldom. We have multiplied our possessions, but reduced our values; we fly in faster planes to arriv ...
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2467 |
ehd123 |
10 years ago |
Five Common Eye-Related Conditions and Diseases
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Try imagining for a second how it'd feel to lose your eyesight. It's almost unimaginable because your vision is perhaps the most valuable tool for survival. This is why we need to constantly protect our eyes and learn what could potentially ail them. Below is a list of five common illnesses that plague the precious eyes of people around the globe. GlaucomaGlaucoma is damage to the optic nerve, often caused by elevated intraocular pressure. It results from excessive production of aqueous humor or diminished ocular fluid outflow. Glaucoma is a leading cause of blindness, secondary to optic nerve damage. As of yet, there is no cure. Everyone is at risk, and there may be no warning signs. It is six to eight times more common in African Americans ...
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2426 |
bio_man |
5 years ago |
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2409 |
ehd123 |
10 years ago |
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2404 |
duddy |
9 years ago |
Earth's largest recorded impact in history
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The Tunguska event was a large explosion that occurred near the Tunguska River, in where is now Russia. The explosion occurred at an altitude of 5–10 kilometres (3–6 mi) by a stony asteroid that is believed to have burst in the air rather than hitting the surface. Since the 1908 explosion, there have been an estimated 1,000 scholarly papers (mainly in Russian) published on the Tunguska explosion. In 2013, a team of researchers led by Victor Kvasnytsya of the National Academy of Sciences of Ukraine published analysis results of micro-samples from a peat bog near the blast epicenter showing fragments that may be of meteoric origin. Estimates of the energy of the blast range from as low as three to as high as 30 megatons of TNT. The energy of th ...
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2366 |
bio_man |
6 years ago |
Rainbows on fire
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Fire rainbows are a rare phenomenon that only occur when the Sun is higher than 58° above the horizon and its light passes through cirrus clouds made of ice crystals. These captivating atmospheric displays are scientifically known as circumhorizontal arcs. While the name "fire rainbow" might suggest a connection with fire or rainbows, it's essential to understand that this phenomenon has nothing to do with fire and isn't a true rainbow. The process behind fire rainbows is intricate. When sunlight interacts with ice crystals in cirrus clouds, the light is refracted, or bent, in a specific way. For a circumhorizontal arc to form, the Sun must be at a relatively high angle in the sky, usually exceeding 58 degrees. This angle allows sunlight to e ...
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2346 |
duddy |
9 years ago |
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2221 |
duddy |
10 years ago |
What the media isn't telling you about war in Syria
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I've been following the war in Syria quite a lot. It's overwhelming to see how little media coverage there is on what's really happening there. This video is most accurate according to my own research. Take a few minutes to watch it...
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2062 |
bio_man |
10 years ago |
Before the iPhone and before the iPad, there was the Newton
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The MessagePad, released in 1993, was the first in a series of Newton devices to be developed and sold on the market. The 1.4 pound physical device was collaboratively manufactured by Apple and Sharp. The MessagePad packed a 20MHz ARM 610 RISC processor, 640 kilobytes of RAM, and a 336x240 monochrome LCD touch screen with stylus and handwriting recognition support. It was powered by four AAA batteries. It ran Newton OS version 1.05 and cost $699.99. The Newton platform was axed from the Apple product line for two main reasons. (1) The early Newton OS that shipped with the original MessagePad proved to be not so user friendly, especially when it came to the unpredictable handwriting recognition software. The press and other media outlets (inc ...
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2059 |
savio |
10 years ago |
Silence leads to madness
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The anechoic chamber is located at Orfield Laboratory in Minneapolis, Minnesota and was designed for testing out hearing aid equipment. To make sure no outside noises are present, the chamber is hidden behind two vault doors and has sound-deadening wedges covering all of the flat surfaces. Rather than sound bouncing off the walls, ceiling, and floor like a traditional room, the sound is absorbed.
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2058 |
duddy |
10 years ago |
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2042 |
duddy |
9 years ago |
3D Imaging: A Practical Use of Mathematics
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3D imaging used in dentistry. Once a panoramic x-ray is taken, the technician uses software to rotate the image; the software uses matrix mathematics to compute the position of the rotated image. One use for matrix math is in programming 3D engines for video games. A single point on the screen can be defined as a vector. The TV or computer screen is two-dimensional only, so to create the look of depth, objects must change size as they come closer to the viewer or go farther back into the scene. An image is made up of hundreds or thousands of vectors. By multiplying this set or matrix, you can change its size. You can also multiply the vector array by another array, which allows you to rotate the image. In rotation, parts of the image become ...
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2035 |
bio_man |
11 months ago |