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The common theory says that dinosaurs had feathers and birds originated from feathered dinosaurs. The oldest feathered dinosaur is considered the 140-million-year-old turkey-sized Sinosauropteryx. Scientists considered the distinctive patterns encountered on the skin of a Sinosauropteryx ("Chinese lizard wing") fossi... |
5 June 2007
02:59 GMT |
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Have you ever imagined a plane flapping its wings in the bat style?The flexible flight of the bats, so different from the rigid wing beat of the birds, could be a model for new versatile aircrafts.A Swedish research resembles a previous American one, in trying to set up the details of the sophisticated bat flight in ... |
11 May 2007
02:51 GMT |
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This poison has made many victims amongst the sea-food consumers till now. The domoic acid is a toxin synthesized especially by microscopic diatoms and red algae. It was first isolated from a red alga named in Japanese "duomoi" and used against gut worms. But high levels kill you, too, not just the worms, as it attac... |
30 April 2007
05:39 GMT |
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Bones had already shown a tight connection between the carnivorous dinosaurs and birds. The discovery of the feathered dinosaurs further confirmed this. But this really tops it off. Scientists managed to compare fossil proteins extracted from a 68-million years old femur bone of an young Tyrannosaurus female to livin... |
13 April 2007
04:36 GMT |
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A marathon is like a warm-up exercise for some animal species. Their endurance capacities can amaze, like they would be driven by engines. Now, a new record for endurance has been tracked in four bar-tailed godwits for a non-stop flight of over 10,000km (6,000 mi) from New Zealand to the Yellow Sea (eastern China).Th... |
5 April 2007
07:05 GMT |
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We all know that in mammals, humans included, sex determination is chromosomal. That means that the composition of the chromosomes determines the gender of the individual: XX (two X chromosomes) means female, XY (one X chromosome and one Y chromosome) - male. Genes on Y are masculinizing, that's why in chromosom... |
22 March 2007
08:16 GMT |
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Eggs are regarded as some of the most fragile things in nature. But when African ostrich eggs were tested, they supported a pressure of 120 kg!Of course, they are the largest eggs: 4.3- 6.4 pounds (or 1.5-2 kg of which 280 g are represented by the shell) and equals some 36 chicken eggs. Crocodiles, even if they can r... |
20 March 2007
11:06 GMT |
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Birds were known for a very long time to have emerged from dinosaurs, but more recently, researchers sniffed out many long-thought strictly avian traits inherited from dinosaurs: feathers, nesting, parental care. Now, the difference between birds and dinosaurs gets even thiner as both groups were found to present the... |
8 March 2007
03:19 GMT |
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65 % of the bird species migrate. The ancients, like Aristotle for example, thought that during the winter birds go inside the mud of the bottom of the swamps or in caves, where they pass the winter, and reemerge in the spring. In the 13th century, the German emperor Frederick the Second, passionate hunter, was the f... |
6 March 2007
03:25 GMT |
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