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This river is the maker of the oldest civilization recorded by the historical sources: 5,000 years ago, the Egyptian state emerged on its banks. It is best known as the longest river on the planet. Nile is consensually considered so as it has 6,695 km in length, even if some say that Amazon is longer (6,800 km). The ... |
15 March 2008
09:05 GMT |
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What is now a massive ball of ice around Saturn, the moon Tethys had an ocean at some point in its past, say researchers at the University of California present at a major science conference in Houston. Tethys is only one of the 60 or so natural satellites orbiting around Saturn, has a medium size and an average dens... |
15 March 2008
08:12 GMT |
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Although Mars doesn't look much like a planet ravaged by volcanic activity in the past, it is clear that it had to go through such a stage in its history. Now, new observations conducted with ESA's Mars Express spacecraft reveal the actions of lava flows and water on the surface, and how these molded the Ma... |
14 March 2008
11:04 GMT |
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In the outcome of previous observations showing that Saturn's moon Enceladus ejects matter out of the geysers on its surface, the Cassini spacecraft executed, on Wednesday, a fly-by through the water ice plume hovering above it. During the swing, Cassini took numerous pictures of the surface of the moon and made... |
14 March 2008
05:42 GMT |
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The Earth is continuously bombarded by space rocks and small cosmic bodies, probably swallowing up to a few tens of tons of matter each day. Most of these rocks go unnoticed because they burn high up in the atmosphere before reaching the surface of the planet, albeit from time to time larger meteorites and asteroids ... |
13 March 2008
04:19 GMT |
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If I hadn't known any better, I could have sworn this was a conspiration to discredit hybrid and electrical vehicles, in the benefit of petrol cars. Since the end of the last month, hybrid cars have gone down the drain, as scientists proved that they actually produce more carbon dioxide than petrol vehicles. Ins... |
11 March 2008
11:43 GMT |
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Over 50 tropical and subtropical areas (20, only in Africa) are infested today by the beautiful water hyacinth (Eichornia crassipes), originating in the Amazon basin. The conquered areas go from Africa (except Sahara and Namib deserts and southern tip of South Africa) to India, Indochina, eastern China, Japonia, New ... |
11 March 2008
11:22 GMT |
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You may love or hate cats, but they gained their right of citizenship in most urban and rural human settlements. Along the millennia, cats accompanied people mostly through their will. Some civilizations adored and worshiped cats (in Egypt, there was even a cat goddess, Bastet), but in other cases cats were useful au... |
11 March 2008
10:42 GMT |
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1. World's largest desert is Sahara, covering most of northern Africa, from the Red Sea and the Mediterranean coasts to the outskirts of the Atlantic ocean. Sahara has an intermittent history of 3 million years. Erratic dunes (called ergs) can vary in height with 180 m (160 ft). The ergs may be punctuated by rug... |
11 March 2008
09:55 GMT |
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The Cassini spacecraft is scheduled tomorrow for a unique fly-by around Saturn's moon Enceladus, to probe in detail the nature of the water plume originating from geysers on the surface in regions around the south pole of the moon. During the fly-by, Cassini will reach an altitude of only 50 kilometers above the... |
11 March 2008
05:35 GMT |
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It's no secret now, Mars is thought to have been much hotter in its past, basically meaning that it could also have had liquid water on its surface at some point in time. NASA's Mars Reconnaissance Orbiter and ESA's Mars Express routinely return evidence of what seems to be gullies or lake beds possibl... |
7 March 2008
04:33 GMT |
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The unique event has been observed by NASA's Mars Reconnaissance Orbiter with the High Resolution Imaging Experiment, HiRISE for short, on February 19, during a scan of a region of the Red Planet's surface near the north pole. This is the first image of an avalanche ever surprised on Mars! The image release... |
4 March 2008
03:22 GMT |
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Everglades National Park was founded in 1947 in southern Florida to protect the fauna and flora of a territory of 600,000 hectares (6,000 square km or 2,400 square mi) of an unique but fragile beauty, one of the ecologically most menaced American territories. 1.400 mi (2.200 km) of canals and 125 surveillance structu... |
29 February 2008
09:07 GMT |
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Not only that, but the new study published by the University of Arizona refutes the evidence that liquid water ever flowed on the surface of the Red Planet. The evidence? Martian gullies which seem to have been carved by the erosive action of some kind of liquid agent, which were spotted on the Martian surface in 199... |
29 February 2008
05:14 GMT |
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NASA is finally talking business and is clearly determined to put a manned mission on the surface of the Moon within the next decade and, why not, to establish a lunar base on our only natural satellite. The new lunar rover demonstrated by the NASA team during the Space Exploration Conference, which took place betwee... |
28 February 2008
09:12 GMT |
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No alibi for killers, no unknown origins for the victims: a new crime-fighting tool analyze human hair for revealing location, helping police to follow the past movements of criminal suspects or murder victims. "You are what you eat and drink - and that is recorded in your hair," said lead researcher Thure Cerling, a... |
26 February 2008
05:02 GMT |
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Intermittent springs represent waters that flow at intervals, apparently not dependent upon rain or drought. They are usually found in calcareous areas. One way these springs function is based on the principle of the simple siphon. A grotto fills with water via rainfall or snow melting. The filling of the grotto is m... |
12 February 2008
14:06 GMT |
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Add water, sand, a bit of imagination and hope it won't collapse too soon, the rest is a piece of cake, scientists say. Quite odd, however, is the fact that sand doesn't require a specific amount of water to maintain its mechanical properties, feature observed by scientists during laboratory experiments whi... |
12 February 2008
06:46 GMT |
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As we all know, most of the known materials expand while being heated and contract when suffering a cooling process. However, a small number of substances, such as water and bismuth, experience an anomalous behavior, meaning that they have negative expansion indexes and expand when cooled and contract when heated. Re... |
8 February 2008
08:43 GMT |
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Images of one of Saturn's moon, brought back by NASA's Cassini orbiter, have recently spawn some of the most fierce debates regarding the solar system exploration program. German astrophysicists argue that there is conclusive evidence that Enceladus, a small moon measuring only 504 kilometers in diameter, m... |
7 February 2008
02:50 GMT |
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Since the day was coming to an end, I thought why not hit Apple Discussions to see what iPod/iPhone users have been at lately. A laugh is always guaranteed since not everyone takes appropriate care of their Apple devices, but some go to extremes in killing their electronics. This poster claims his iPod "was in the ra... |
6 February 2008
11:53 GMT |
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Back on 13 April 2007, during its 4199 orbit around the Red Planet, ESA's Mars Express took an image of the Terby crater, with the help of its High Resolution Stereo Camera. It seems to be presenting high scientific interest, mainly because it could hold valuable information about the role of liquid water in the... |
1 February 2008
05:59 GMT |
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Water is probably one of the strangest substances known to man, mainly due to some mind baffling properties that seem to surprise scientists on a daily basis. It is the only known substance to exist in a free state in all three phases - gaseous, liquid and solid. As it freezes, it has a lower density than that of the... |
1 February 2008
05:07 GMT |
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Telepathy sounds like something out of the freak show, or SF stories. But, this trait has been found to be displayed by the DNA molecules. DNA double helixes can recognize fitting sequences from a distance and then join together, without the implication of enzymes or other molecules. Researchers had not suspected tha... |
28 January 2008
03:32 GMT |
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Severe drought raging across the southeast regions of the United States will probably determine a temporary reduction in electric power production capabilities of most of the nuclear plants, or even shutdowns, until the water levels in the rivers that supply the lakes near the power plants rise again to their normal ... |
24 January 2008
09:49 GMT |
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1.About 97% of the water is found in the oceans and seas, 2% in glaciers and ice caps, 0.6% in the table water and 0.02% in rivers and lakes. Water vapors found in the atmosphere and forming the clouds represent 0.001%. Annual rainfall and snowfall on Earth is of 113,000 million cubic meters. This would satisfy human... |
24 January 2008
06:50 GMT |
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1. Ocean life can go from the surface down to... 2.5 km (1.5 mi) under the ocean floor. That's the place where living bacteria were found! 2. At a depth of 5 m (16 ft), 50 % of the solar light is already absorbed. At a depth of 25 m (83 ft), just 3 % of the sunlight penetrates. 3. The base of the food chain is t... |
23 January 2008
14:06 GMT |
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For millennia, people had been making ships of wood. Than, around 1790, the first iron ship was made. People thought iron would sink, as it is denser than the wood. But the floating capacity depends on the ratio between weight and volume. No matter the weight of a ship, it will float if its volume is large enough. A ... |
23 January 2008
08:24 GMT |
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Meteorological systems are continuously moving air masses, with diameters of 150-4,000 km (92-2,500 mi). Some are 12-15 km (7.5-9.2 mi) deep, located in the troposphere (the lower layer of the atmosphere). Those that are 1-3 km (0.6-1.8 mi) deep are faster. The meteorological systems are defined by their variations i... |
21 January 2008
14:06 GMT |
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Just when you think you know everything about it, it starts again acting in unpredictable ways. Water is probably the substance with the longest list of anomalies known to man, meaning it behaves in unique and contrary ways in relation to the vast majority of all the other substances. When it freezes, it expands, as ... |
19 January 2008
06:34 GMT |
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1. You may believe that Mount Everest is the tallest in the world, with its 8,848 m (29,450 ft) in altitude. Yet, it was proven that the volcano Mauna Loa from Hawaii is taller by 2,300 m (7,660 ft), if we measure it from its base on the bottom of the ocean. 2. The mapping of the oceanic bottom revealed oceans are ex... |
18 January 2008
07:41 GMT |
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The different shapes and sizes of snowflakes have been eluding scientists and mathematicians ever since the 17th century. Though they exist in multiple shapes, one of the most mysterious aspects of the natural snowflake growing process is why don't they produce an even wider range of crystal types. For the first... |
17 January 2008
10:55 GMT |
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1.Eared seals originated from Enaliarctidae, small mammals that inhabited the northern shores of the Pacific 12-13 million years ago. The first known eared seal is Pithanotaria starri, a small seal which lived 11 million years ago. Males were the same size as females.Eight million years ago, the first proper seals ap... |
16 January 2008
16:50 GMT |
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Most of the popular science articles and documentaries published over the years imprinted in our imagination a picture of Mars dominated by a massive desert of red sand constantly bayed in sunlight. Recent findings, however, tell a different story. ESA's Mars Express spacecraft revealed the presence of clouds of... |
16 January 2008
08:17 GMT |
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Lakes are classified depending on how they formed and on the quality of the water (freshwater or saltwater). Only in the saltiest lakes there is no life. Lakes contain 4 times more freshwater than the rivers, but, if they are not continuously supplied with freshwater, they can disappear through dessication or accumul... |
15 January 2008
08:30 GMT |
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1.There are two species of minks. Even if they belong to the same genus of the stoats, weasels and polecats, Mustela, they do not have a common origin, but are the result of convergent evolution. This is proven by skull characters, karyotype (number and shape of the chromosomes), immunology. 2.Minks are solitary crea... |
14 January 2008
16:16 GMT |
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Diseases can be genetic or (most often) determined by the environmental factors. World Health Organization says that annually 25 million adults and children die of causes that could be prevented. 1.Clime. Too hot or too cold is bad. In warm climes, hot weather makes people experience "tiredness", fainting, lack of e... |
11 January 2008
14:31 GMT |
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Since the dawn of civilization, people have been building tunnels for accessing tombs or underground quarries, or in the hill slopes for allowing the flow of water from porous rocks. Romans were skilled tunnel builders, who made several kilometers long underground passages using the work of slaves. They made a 5.6 km... |
11 January 2008
07:00 GMT |
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Islanders blamed them on the witchcraft, the Inca on the spirits of the ancestors. Geysers are a type of hot spring that erupt periodically, ejecting a column of hot water and steams into the air. Their emergence needs a combination of factors (water, heat and fortuitous plumbing) that exists in only a few places on ... |
9 January 2008
08:14 GMT |
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Who would be so insane even to study such an effect? Well apparently, chemical companies find no laughing matter regarding such processes and are barely waiting to get their hands on the model followed by the water molecules during the melting process of ice. What appears to be as a well known natural process for mos... |
9 January 2008
06:56 GMT |
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1.Crayfish is a freshwater variant of the lobster. In Europe, their meat is highly appreciated. In Europe, the first producer is Norway, whereas the first consumer is France. What is consumed from the crayfish is the meat from the abdomen and claws. 2.These crustaceans have a good eyesight and, like other related spe... |
8 January 2008
06:39 GMT |
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Windmills have been used even since the 6th century in Persia (Iran). Unlike the later type used in Europe, this one had a vertical ax with sails which worked on horizontal supports. Mill stones from the inferior end ground the cereals for getting flour. The first mention of a windmill in Europe is that of Bury St Ed... |
7 January 2008
16:46 GMT |
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Fire is the biggest destroyer of human life and goods. Now the ultimate technologies fights against it. Conventional firemen cars for putting out building fires are endowed with tanks of 1,365 liters of water and telescopic stairs with a length of 9-15 m (30-50 ft). This water is used only when there is no other sou... |
4 January 2008
14:06 GMT |
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The chemical substance that we commonly call water presents some of the longest lists of substance anomalies known to man, amongst which most of them are widely a mystery to most people, such as phase, density, material, thermodynamic and physical anomalies. For example, water as a gas is the lightest known, as a liq... |
21 December 2007
06:50 GMT |
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The largest river in Southeastern Asia, Mekong is also the 11th-longest river in the world and the 12th-largest in volume (discharging 475 km³ of water annually). Its estimated length is 4,880 km (3,032 mi), and it drains an area of 810,000 km² (313,000 sq mi). From the Tibetan Plateau it runs through Yunnan (China),... |
18 December 2007
06:48 GMT |
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What is more amazing about a cave landscape than the presence of stalactites and stalagmites? A stalactite ("drip" or "that which drips" in Old Greek), also called dripstone, is a type of speleothem (secondary mineral) hanging from the ceiling or wall of limestone caves. The wonderful sharpened cones are the result o... |
17 December 2007
07:42 GMT |
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Jupiter's natural satellite Europa, is the only cosmic body in the solar system that might have an ocean of liquid water under its frozen surface, except for Earth. This represents a great opportunity for astrobiologists who believe that in the ocean life might be present, as diverse as in the oceans on Earth. H... |
14 December 2007
03:04 GMT |
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We know now that Mars had flowing water on its surface once, and that it still has some water trapped on its surface in the form of ice. However, scientists have recently discovered that Mars might still have some water flowing of its surface. This comes as a result of a study made by professor Berry Lyons, from the ... |
10 December 2007
10:15 GMT |
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According to simulations of clouds present in Mars' atmosphere, they contain less water than previously calculated. Similar clouds of water ice form on Earth, though on Mars they are created at temperatures below 100 degrees Celsius, and are extremely difficult to replicate in controlled conditions at such low t... |
7 December 2007
05:17 GMT |
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There's no life without water, from elephants and humans to bacteria. We must consume 2.5 liters of water from food and beverage to remain healthy. Water is also necessary for livestock and farming, the means for producing our food. Our planet could be covered by a global ocean 2.5 km (1.5 mi) deep if even. But ... |
5 December 2007
10:39 GMT |
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