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If you still do not believe that the Antarctic ice will melt, and your beach house will be flooded, read this: last winter has been the warmest in Europe in over 700 years! A similarly hot winter could have occurred in 1289, as found by a Swiss team led by Jrg Luterbacher at the University of Bern.The earliest European c... |
21 June 2007
06:48 GMT |
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Many people have heard about the phrase "absolute zero," not many know what it really implies, and fewer have asked themselves the question "what happens below absolute zero?" Are there upper and lower limits to temperature?Absolute zero is known to be 0 K (-273.15 C, -459.67 F) and it's used to describe a th... |
18 June 2007
12:55 GMT |
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A light-emitting diode (LED) is a semiconductor device that emits incoherent narrow-spectrum light through a form of electroluminescence. LEDs are small extended sources with extra optics added to the chip, which emit a complex intensity spatial distribution. The color of the emitted light depends on the composition... |
28 May 2007
15:31 GMT |
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Weather balloons are usually helium- or hydrogen-filled balloons which carry instruments on board to send back information on atmospheric pressure, temperature, humidity and wind. They can reach altitudes of 40 km (25 miles) or more and on some occasions, have been sometimes cited as the cause for UFO sightings.Now,... |
23 May 2007
08:44 GMT |
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A new technology is developing sensors that could precisely locate any passenger aboard a plane who tries to use chemical or bacteriological agents to take over the plane. They are so accurate that they immediately identify the seat where the substance is released.Terrorist activities around the world have increased... |
23 May 2007
05:08 GMT |
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A new experiment performed in the US has proved that a Bose-Einstein condensate can exist in polaritons, a cooled system of particles. This is not the first time scientists claim to have the proof of its existence, but in similar previous applications many suspected that the coherence was in fact the effect of the l... |
18 May 2007
06:55 GMT |
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Electron correlation is a relatively new concept and it deals with mutual dependence between electrons, summarizing the effects of the repulsion forces acting in the spaces between electrons. It specifically handles the way this repulsion influences the spatial and dynamical motion of the electrons. The concept is ... |
15 May 2007
10:26 GMT |
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Global warming may still seem a remote concept for you, but our grandsons will experience tropical summers on very temperate latitudes. NASA researchers say that global warming could raise average summer temperatures in the eastern United States with 10 degrees Fahrenheit (5.5 degrees C) by the 2080s."There is the p... |
10 May 2007
03:36 GMT |
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Plexiglas, in fact an acrylic glass, is the commercial name of Polymethyl methacrylate (PMMA) or poly (methyl 2-methylpropenoate) is the synthetic polymer of methyl methacrylate. It is thermoplastic - deformable, melts to a liquid when heated and freezes to a brittle, glassy state when cooled sufficiently - transpar... |
24 April 2007
09:30 GMT |
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Hot sex for lizards can mean ... no males!Because warmer temperatures bias the sex of dragon lizards while inside the eggs, transforming males into females. It seems that high temperatures turn off the maleness gene(s) on their sex chromosomes. "The sex-reversed lizards look female and have female organs but genetica... |
20 April 2007
03:11 GMT |
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Spring in the temperate areas is the time when a cycle interrupted by the winter is restarted. Many people are worried by the fact that the extremely warm winters - due to the current man made global warming - could make trees bloom in January or February. But this is not going to happen, as plants and most animals r... |
17 April 2007
11:00 GMT |
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This is the engine of life on Earth: photosynthesis is the process by which plants and cyanobacteria retain sunlight energy into biochemical compounds with almost 100-percent efficiency. The energy transfer must occur almost instantaneously, so little energy amount is lost as heat, so the secret is in the speed of th... |
13 April 2007
09:14 GMT |
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A new astonishing finding explains us the origin of the behavior of our ancestors of employing caves as shelter. Recently, a team from Iowa State University led by anthropologist Jill Pruetz had signaled in savanna chimpanzees from Senegal the habit of employing sharpened sticks to hunt small animals (particularly bu... |
11 April 2007
02:56 GMT |
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20 years ago, researchers at the Argonne National Laboratory came with the most known high-temperature superconductor YBa2Cu3O7. Now, they have solved another puzzle of the superconductivity: how a slight change in the structure of electron-doped superconductors turns superconductivity on and off. Superconductivity i... |
21 March 2007
07:40 GMT |
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